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Finding the Fourth Proportional to 647,686.20, 971,529.30 and 605,695.80

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Solution

The fourth proportional to 647,686.20, 971,529.30 and 605,695.80 is: 908,543.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,686.20 : 971,529.30 = 605,695.80 : x
  2. Step 2: Convert to fraction form
    647,686.20/971,529.30 = 605,695.80/x
  3. Step 3: Cross multiply
    647,686.20x = 971,529.30 × 605,695.80
  4. Step 4: Simplify right side
    647,686.20x = 588,451,216,586.94
  5. Step 5: Solve for x
    x = 588,451,216,586.94/647,686.20
  6. Step 6: Final answer
    x = 908,543.70

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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.