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Finding the Fourth Proportional to 393,279.89, 542,767.86 and 240,407.57

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Solution

The fourth proportional to 393,279.89, 542,767.86 and 240,407.57 is: 331,787.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,279.89 : 542,767.86 = 240,407.57 : x
  2. Step 2: Convert to fraction form
    393,279.89/542,767.86 = 240,407.57/x
  3. Step 3: Cross multiply
    393,279.89x = 542,767.86 × 240,407.57
  4. Step 4: Simplify right side
    393,279.89x = 130,485,499,582.86
  5. Step 5: Solve for x
    x = 130,485,499,582.86/393,279.89
  6. Step 6: Final answer
    x = 331,787.88

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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.