Home / 1,380,430.71-1,904,701.55-870,837.75

Finding the Fourth Proportional to 1,380,430.71, 1,904,701.55 and 870,837.75

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Solution

The fourth proportional to 1,380,430.71, 1,904,701.55 and 870,837.75 is: 1,201,571.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,430.71 : 1,904,701.55 = 870,837.75 : x
  2. Step 2: Convert to fraction form
    1,380,430.71/1,904,701.55 = 870,837.75/x
  3. Step 3: Cross multiply
    1,380,430.71x = 1,904,701.55 × 870,837.75
  4. Step 4: Simplify right side
    1,380,430.71x = 1,658,686,007,869.32
  5. Step 5: Solve for x
    x = 1,658,686,007,869.32/1,380,430.71
  6. Step 6: Final answer
    x = 1,201,571.36

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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.