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Finding the Fourth Proportional to 647,191.04, 971,287.82 and 521,139.95

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Solution

The fourth proportional to 647,191.04, 971,287.82 and 521,139.95 is: 782,113.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,191.04 : 971,287.82 = 521,139.95 : x
  2. Step 2: Convert to fraction form
    647,191.04/971,287.82 = 521,139.95/x
  3. Step 3: Cross multiply
    647,191.04x = 971,287.82 × 521,139.95
  4. Step 4: Simplify right side
    647,191.04x = 506,176,878,488.27
  5. Step 5: Solve for x
    x = 506,176,878,488.27/647,191.04
  6. Step 6: Final answer
    x = 782,113.55

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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.