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Finding the Fourth Proportional to 709,902.82, 979,658.44 and 387,611.92

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Solution

The fourth proportional to 709,902.82, 979,658.44 and 387,611.92 is: 534,900.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,902.82 : 979,658.44 = 387,611.92 : x
  2. Step 2: Convert to fraction form
    709,902.82/979,658.44 = 387,611.92/x
  3. Step 3: Cross multiply
    709,902.82x = 979,658.44 × 387,611.92
  4. Step 4: Simplify right side
    709,902.82x = 379,727,288,872.61
  5. Step 5: Solve for x
    x = 379,727,288,872.61/709,902.82
  6. Step 6: Final answer
    x = 534,900.38

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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.