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Finding the Fourth Proportional to 408,225.30, 612,337.95 and 123,915.30

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Solution

The fourth proportional to 408,225.30, 612,337.95 and 123,915.30 is: 185,872.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,225.30 : 612,337.95 = 123,915.30 : x
  2. Step 2: Convert to fraction form
    408,225.30/612,337.95 = 123,915.30/x
  3. Step 3: Cross multiply
    408,225.30x = 612,337.95 × 123,915.30
  4. Step 4: Simplify right side
    408,225.30x = 75,878,040,775.64
  5. Step 5: Solve for x
    x = 75,878,040,775.64/408,225.30
  6. Step 6: Final answer
    x = 185,872.95

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1.5x scale

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.