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Finding the Fourth Proportional to 386,388.68, 579,635.78 and 133,601.30

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Solution

The fourth proportional to 386,388.68, 579,635.78 and 133,601.30 is: 200,420.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,388.68 : 579,635.78 = 133,601.30 : x
  2. Step 2: Convert to fraction form
    386,388.68/579,635.78 = 133,601.30/x
  3. Step 3: Cross multiply
    386,388.68x = 579,635.78 × 133,601.30
  4. Step 4: Simplify right side
    386,388.68x = 77,440,090,168.33
  5. Step 5: Solve for x
    x = 77,440,090,168.33/386,388.68
  6. Step 6: Final answer
    x = 200,420.19

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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.