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Finding the Fourth Proportional to 390,475.71, 585,201.65 and 222,073.47

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Solution

The fourth proportional to 390,475.71, 585,201.65 and 222,073.47 is: 332,819.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,475.71 : 585,201.65 = 222,073.47 : x
  2. Step 2: Convert to fraction form
    390,475.71/585,201.65 = 222,073.47/x
  3. Step 3: Cross multiply
    390,475.71x = 585,201.65 × 222,073.47
  4. Step 4: Simplify right side
    390,475.71x = 129,957,759,954.86
  5. Step 5: Solve for x
    x = 129,957,759,954.86/390,475.71
  6. Step 6: Final answer
    x = 332,819.06

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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.