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Finding the Fourth Proportional to 391,092.54, 539,429.10 and 358,930.68

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Solution

The fourth proportional to 391,092.54, 539,429.10 and 358,930.68 is: 495,068.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,092.54 : 539,429.10 = 358,930.68 : x
  2. Step 2: Convert to fraction form
    391,092.54/539,429.10 = 358,930.68/x
  3. Step 3: Cross multiply
    391,092.54x = 539,429.10 × 358,930.68
  4. Step 4: Simplify right side
    391,092.54x = 193,617,653,674.79
  5. Step 5: Solve for x
    x = 193,617,653,674.79/391,092.54
  6. Step 6: Final answer
    x = 495,068.64

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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.