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Finding the Fourth Proportional to 391,148.89, 585,978.53 and 222,785.42

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Solution

The fourth proportional to 391,148.89, 585,978.53 and 222,785.42 is: 333,753.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,148.89 : 585,978.53 = 222,785.42 : x
  2. Step 2: Convert to fraction form
    391,148.89/585,978.53 = 222,785.42/x
  3. Step 3: Cross multiply
    391,148.89x = 585,978.53 × 222,785.42
  4. Step 4: Simplify right side
    391,148.89x = 130,547,472,917.03
  5. Step 5: Solve for x
    x = 130,547,472,917.03/391,148.89
  6. Step 6: Final answer
    x = 333,753.92

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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.