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Finding the Fourth Proportional to 717,070.71, 989,520.02 and 394,717.85

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Solution

The fourth proportional to 717,070.71, 989,520.02 and 394,717.85 is: 544,689.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,070.71 : 989,520.02 = 394,717.85 : x
  2. Step 2: Convert to fraction form
    717,070.71/989,520.02 = 394,717.85/x
  3. Step 3: Cross multiply
    717,070.71x = 989,520.02 × 394,717.85
  4. Step 4: Simplify right side
    717,070.71x = 390,581,207,905.17
  5. Step 5: Solve for x
    x = 390,581,207,905.17/717,070.71
  6. Step 6: Final answer
    x = 544,689.95

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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.