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Finding the Fourth Proportional to 386,660.72, 579,851.58 and 133,872.68

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Solution

The fourth proportional to 386,660.72, 579,851.58 and 133,872.68 is: 200,760.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,660.72 : 579,851.58 = 133,872.68 : x
  2. Step 2: Convert to fraction form
    386,660.72/579,851.58 = 133,872.68/x
  3. Step 3: Cross multiply
    386,660.72x = 579,851.58 × 133,872.68
  4. Step 4: Simplify right side
    386,660.72x = 77,626,285,016.83
  5. Step 5: Solve for x
    x = 77,626,285,016.83/386,660.72
  6. Step 6: Final answer
    x = 200,760.72

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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.