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Finding the Fourth Proportional to 386,662.72, 579,854.58 and 133,874.68

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Solution

The fourth proportional to 386,662.72, 579,854.58 and 133,874.68 is: 200,763.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,662.72 : 579,854.58 = 133,874.68 : x
  2. Step 2: Convert to fraction form
    386,662.72/579,854.58 = 133,874.68/x
  3. Step 3: Cross multiply
    386,662.72x = 579,854.58 × 133,874.68
  4. Step 4: Simplify right side
    386,662.72x = 77,627,846,344.03
  5. Step 5: Solve for x
    x = 77,627,846,344.03/386,662.72
  6. Step 6: Final answer
    x = 200,763.72

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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.