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Finding the Fourth Proportional to 717,954.52, 990,758.99 and 391,275.94

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Solution

The fourth proportional to 717,954.52, 990,758.99 and 391,275.94 is: 539,950.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,954.52 : 990,758.99 = 391,275.94 : x
  2. Step 2: Convert to fraction form
    717,954.52/990,758.99 = 391,275.94/x
  3. Step 3: Cross multiply
    717,954.52x = 990,758.99 × 391,275.94
  4. Step 4: Simplify right side
    717,954.52x = 387,660,155,125.70
  5. Step 5: Solve for x
    x = 387,660,155,125.70/717,954.52
  6. Step 6: Final answer
    x = 539,950.85

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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.