Home / 1,389,962,886.71-1,918,186,241.82-817,785,879.19

Finding the Fourth Proportional to 1,389,962,886.71, 1,918,186,241.82 and 817,785,879.19

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Solution

The fourth proportional to 1,389,962,886.71, 1,918,186,241.82 and 817,785,879.19 is: 1,128,566,551.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,962,886.71 : 1,918,186,241.82 = 817,785,879.19 : x
  2. Step 2: Convert to fraction form
    1,389,962,886.71/1,918,186,241.82 = 817,785,879.19/x
  3. Step 3: Cross multiply
    1,389,962,886.71x = 1,918,186,241.82 × 817,785,879.19
  4. Step 4: Simplify right side
    1,389,962,886.71x = 1,568,665,622,203,250,688
  5. Step 5: Solve for x
    x = 1,568,665,622,203,250,688/1,389,962,886.71
  6. Step 6: Final answer
    x = 1,128,566,551.81

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Double scale
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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.