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Finding the Fourth Proportional to 647,711.70, 971,567.55 and 605,721.30

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Solution

The fourth proportional to 647,711.70, 971,567.55 and 605,721.30 is: 908,581.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,711.70 : 971,567.55 = 605,721.30 : x
  2. Step 2: Convert to fraction form
    647,711.70/971,567.55 = 605,721.30/x
  3. Step 3: Cross multiply
    647,711.70x = 971,567.55 × 605,721.30
  4. Step 4: Simplify right side
    647,711.70x = 588,499,159,423.82
  5. Step 5: Solve for x
    x = 588,499,159,423.82/647,711.70
  6. Step 6: Final answer
    x = 908,581.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.