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Finding the Fourth Proportional to 378,008.71, 520,934.28 and 270,391.90

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Solution

The fourth proportional to 378,008.71, 520,934.28 and 270,391.90 is: 372,627.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,008.71 : 520,934.28 = 270,391.90 : x
  2. Step 2: Convert to fraction form
    378,008.71/520,934.28 = 270,391.90/x
  3. Step 3: Cross multiply
    378,008.71x = 520,934.28 × 270,391.90
  4. Step 4: Simplify right side
    378,008.71x = 140,856,409,744.33
  5. Step 5: Solve for x
    x = 140,856,409,744.33/378,008.71
  6. Step 6: Final answer
    x = 372,627.42

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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.