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Finding the Fourth Proportional to 922,915.20, 1,384,372.80 and 425,251.20

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Solution

The fourth proportional to 922,915.20, 1,384,372.80 and 425,251.20 is: 637,876.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,915.20 : 1,384,372.80 = 425,251.20 : x
  2. Step 2: Convert to fraction form
    922,915.20/1,384,372.80 = 425,251.20/x
  3. Step 3: Cross multiply
    922,915.20x = 1,384,372.80 × 425,251.20
  4. Step 4: Simplify right side
    922,915.20x = 588,706,194,447.36
  5. Step 5: Solve for x
    x = 588,706,194,447.36/922,915.20
  6. Step 6: Final answer
    x = 637,876.80

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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.