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Finding the Fourth Proportional to 386,278.70, 579,392.64 and 133,500.38

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Solution

The fourth proportional to 386,278.70, 579,392.64 and 133,500.38 is: 200,241.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,278.70 : 579,392.64 = 133,500.38 : x
  2. Step 2: Convert to fraction form
    386,278.70/579,392.64 = 133,500.38/x
  3. Step 3: Cross multiply
    386,278.70x = 579,392.64 × 133,500.38
  4. Step 4: Simplify right side
    386,278.70x = 77,349,134,712.24
  5. Step 5: Solve for x
    x = 77,349,134,712.24/386,278.70
  6. Step 6: Final answer
    x = 200,241.78

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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.