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Finding the Fourth Proportional to 659,854.36, 989,781.18 and 239,129.56

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Solution

The fourth proportional to 659,854.36, 989,781.18 and 239,129.56 is: 358,694.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,854.36 : 989,781.18 = 239,129.56 : x
  2. Step 2: Convert to fraction form
    659,854.36/989,781.18 = 239,129.56/x
  3. Step 3: Cross multiply
    659,854.36x = 989,781.18 × 239,129.56
  4. Step 4: Simplify right side
    659,854.36x = 236,685,938,069.68
  5. Step 5: Solve for x
    x = 236,685,938,069.68/659,854.36
  6. Step 6: Final answer
    x = 358,694.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.