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Finding the Fourth Proportional to 391,068.20, 539,395.33 and 358,906.49

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Solution

The fourth proportional to 391,068.20, 539,395.33 and 358,906.49 is: 495,035.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,068.20 : 539,395.33 = 358,906.49 : x
  2. Step 2: Convert to fraction form
    391,068.20/539,395.33 = 358,906.49/x
  3. Step 3: Cross multiply
    391,068.20x = 539,395.33 × 358,906.49
  4. Step 4: Simplify right side
    391,068.20x = 193,592,484,612.69
  5. Step 5: Solve for x
    x = 193,592,484,612.69/391,068.20
  6. Step 6: Final answer
    x = 495,035.10

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1.5x scale

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.