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Finding the Fourth Proportional to 625,307.28, 937,862.91 and 198,787.20

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Solution

The fourth proportional to 625,307.28, 937,862.91 and 198,787.20 is: 298,149.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,307.28 : 937,862.91 = 198,787.20 : x
  2. Step 2: Convert to fraction form
    625,307.28/937,862.91 = 198,787.20/x
  3. Step 3: Cross multiply
    625,307.28x = 937,862.91 × 198,787.20
  4. Step 4: Simplify right side
    625,307.28x = 186,435,141,862.75
  5. Step 5: Solve for x
    x = 186,435,141,862.75/625,307.28
  6. Step 6: Final answer
    x = 298,149.64

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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.