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Finding the Fourth Proportional to 402,691.91, 603,660.60 and 136,265.90

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Solution

The fourth proportional to 402,691.91, 603,660.60 and 136,265.90 is: 204,271.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,691.91 : 603,660.60 = 136,265.90 : x
  2. Step 2: Convert to fraction form
    402,691.91/603,660.60 = 136,265.90/x
  3. Step 3: Cross multiply
    402,691.91x = 603,660.60 × 136,265.90
  4. Step 4: Simplify right side
    402,691.91x = 82,258,351,935.24
  5. Step 5: Solve for x
    x = 82,258,351,935.24/402,691.91
  6. Step 6: Final answer
    x = 204,271.18

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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.