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Finding the Fourth Proportional to 425,915.60, 638,361.40 and 176,469.20

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Solution

The fourth proportional to 425,915.60, 638,361.40 and 176,469.20 is: 264,491.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,915.60 : 638,361.40 = 176,469.20 : x
  2. Step 2: Convert to fraction form
    425,915.60/638,361.40 = 176,469.20/x
  3. Step 3: Cross multiply
    425,915.60x = 638,361.40 × 176,469.20
  4. Step 4: Simplify right side
    425,915.60x = 112,651,125,568.88
  5. Step 5: Solve for x
    x = 112,651,125,568.88/425,915.60
  6. Step 6: Final answer
    x = 264,491.66

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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.