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Finding the Fourth Proportional to 386,388.18, 579,635.03 and 133,600.79

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Solution

The fourth proportional to 386,388.18, 579,635.03 and 133,600.79 is: 200,419.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,388.18 : 579,635.03 = 133,600.79 : x
  2. Step 2: Convert to fraction form
    386,388.18/579,635.03 = 133,600.79/x
  3. Step 3: Cross multiply
    386,388.18x = 579,635.03 × 133,600.79
  4. Step 4: Simplify right side
    386,388.18x = 77,439,697,919.67
  5. Step 5: Solve for x
    x = 77,439,697,919.67/386,388.18
  6. Step 6: Final answer
    x = 200,419.43

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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.