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Finding the Fourth Proportional to 391,063.92, 539,668.17 and 212,215.92

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Solution

The fourth proportional to 391,063.92, 539,668.17 and 212,215.92 is: 292,857.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,063.92 : 539,668.17 = 212,215.92 : x
  2. Step 2: Convert to fraction form
    391,063.92/539,668.17 = 212,215.92/x
  3. Step 3: Cross multiply
    391,063.92x = 539,668.17 × 212,215.92
  4. Step 4: Simplify right side
    391,063.92x = 114,526,177,191.27
  5. Step 5: Solve for x
    x = 114,526,177,191.27/391,063.92
  6. Step 6: Final answer
    x = 292,857.95

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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.