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Finding the Fourth Proportional to 391,644.91, 540,287.58 and 230,397.40

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Solution

The fourth proportional to 391,644.91, 540,287.58 and 230,397.40 is: 317,841.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,644.91 : 540,287.58 = 230,397.40 : x
  2. Step 2: Convert to fraction form
    391,644.91/540,287.58 = 230,397.40/x
  3. Step 3: Cross multiply
    391,644.91x = 540,287.58 × 230,397.40
  4. Step 4: Simplify right side
    391,644.91x = 124,480,853,684.29
  5. Step 5: Solve for x
    x = 124,480,853,684.29/391,644.91
  6. Step 6: Final answer
    x = 317,841.11

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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.