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Finding the Fourth Proportional to 378,251.57, 521,269.32 and 270,634.16

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Solution

The fourth proportional to 378,251.57, 521,269.32 and 270,634.16 is: 372,961.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,251.57 : 521,269.32 = 270,634.16 : x
  2. Step 2: Convert to fraction form
    378,251.57/521,269.32 = 270,634.16/x
  3. Step 3: Cross multiply
    378,251.57x = 521,269.32 × 270,634.16
  4. Step 4: Simplify right side
    378,251.57x = 141,073,286,870.02
  5. Step 5: Solve for x
    x = 141,073,286,870.02/378,251.57
  6. Step 6: Final answer
    x = 372,961.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.