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Finding the Fourth Proportional to 709,902.81, 979,658.44 and 387,611.91

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Solution

The fourth proportional to 709,902.81, 979,658.44 and 387,611.91 is: 534,900.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,902.81 : 979,658.44 = 387,611.91 : x
  2. Step 2: Convert to fraction form
    709,902.81/979,658.44 = 387,611.91/x
  3. Step 3: Cross multiply
    709,902.81x = 979,658.44 × 387,611.91
  4. Step 4: Simplify right side
    709,902.81x = 379,727,279,076.02
  5. Step 5: Solve for x
    x = 379,727,279,076.02/709,902.81
  6. Step 6: Final answer
    x = 534,900.37

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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.