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Finding the Fourth Proportional to 392,414.40, 587,455.20 and 234,561.60

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Solution

The fourth proportional to 392,414.40, 587,455.20 and 234,561.60 is: 351,145.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,414.40 : 587,455.20 = 234,561.60 : x
  2. Step 2: Convert to fraction form
    392,414.40/587,455.20 = 234,561.60/x
  3. Step 3: Cross multiply
    392,414.40x = 587,455.20 × 234,561.60
  4. Step 4: Simplify right side
    392,414.40x = 137,794,431,640.32
  5. Step 5: Solve for x
    x = 137,794,431,640.32/392,414.40
  6. Step 6: Final answer
    x = 351,145.20

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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.