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Finding the Fourth Proportional to 425,414.02, 638,213.30 and 125,915.64

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Solution

The fourth proportional to 425,414.02, 638,213.30 and 125,915.64 is: 188,900.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,414.02 : 638,213.30 = 125,915.64 : x
  2. Step 2: Convert to fraction form
    425,414.02/638,213.30 = 125,915.64/x
  3. Step 3: Cross multiply
    425,414.02x = 638,213.30 × 125,915.64
  4. Step 4: Simplify right side
    425,414.02x = 80,361,036,126.01
  5. Step 5: Solve for x
    x = 80,361,036,126.01/425,414.02
  6. Step 6: Final answer
    x = 188,900.77

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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.