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Finding the Fourth Proportional to 425,492.46, 638,332.02 and 125,996.40

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Solution

The fourth proportional to 425,492.46, 638,332.02 and 125,996.40 is: 189,022.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,492.46 : 638,332.02 = 125,996.40 : x
  2. Step 2: Convert to fraction form
    425,492.46/638,332.02 = 125,996.40/x
  3. Step 3: Cross multiply
    425,492.46x = 638,332.02 × 125,996.40
  4. Step 4: Simplify right side
    425,492.46x = 80,427,536,524.73
  5. Step 5: Solve for x
    x = 80,427,536,524.73/425,492.46
  6. Step 6: Final answer
    x = 189,022.24

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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.