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Finding the Fourth Proportional to 252,458.40, 378,687.60 and 74,992.80

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Solution

The fourth proportional to 252,458.40, 378,687.60 and 74,992.80 is: 112,489.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,458.40 : 378,687.60 = 74,992.80 : x
  2. Step 2: Convert to fraction form
    252,458.40/378,687.60 = 74,992.80/x
  3. Step 3: Cross multiply
    252,458.40x = 378,687.60 × 74,992.80
  4. Step 4: Simplify right side
    252,458.40x = 28,398,843,449.28
  5. Step 5: Solve for x
    x = 28,398,843,449.28/252,458.40
  6. Step 6: Final answer
    x = 112,489.20

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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.