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Finding the Fourth Proportional to 391,068.66, 539,395.91 and 358,906.91

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Solution

The fourth proportional to 391,068.66, 539,395.91 and 358,906.91 is: 495,035.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,068.66 : 539,395.91 = 358,906.91 : x
  2. Step 2: Convert to fraction form
    391,068.66/539,395.91 = 358,906.91/x
  3. Step 3: Cross multiply
    391,068.66x = 539,395.91 × 358,906.91
  4. Step 4: Simplify right side
    391,068.66x = 193,592,920,222.65
  5. Step 5: Solve for x
    x = 193,592,920,222.65/391,068.66
  6. Step 6: Final answer
    x = 495,035.63

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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.