Home / 1,282,190,485.86-1,769,404,569.72-709,918,847.69

Finding the Fourth Proportional to 1,282,190,485.86, 1,769,404,569.72 and 709,918,847.69

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Solution

The fourth proportional to 1,282,190,485.86, 1,769,404,569.72 and 709,918,847.69 is: 979,677,877.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282,190,485.86 : 1,769,404,569.72 = 709,918,847.69 : x
  2. Step 2: Convert to fraction form
    1,282,190,485.86/1,769,404,569.72 = 709,918,847.69/x
  3. Step 3: Cross multiply
    1,282,190,485.86x = 1,769,404,569.72 × 709,918,847.69
  4. Step 4: Simplify right side
    1,282,190,485.86x = 1,256,133,653,233,042,688
  5. Step 5: Solve for x
    x = 1,256,133,653,233,042,688/1,282,190,485.86
  6. Step 6: Final answer
    x = 979,677,877.11

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Double scale
Find fourth proportional to 1,282,190,486.86, 1,769,404,571.10 and 709,918,848.69
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.