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Finding the Fourth Proportional to 392,304.20, 539,680.86 and 343,687.16

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Solution

The fourth proportional to 392,304.20, 539,680.86 and 343,687.16 is: 472,799.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,304.20 : 539,680.86 = 343,687.16 : x
  2. Step 2: Convert to fraction form
    392,304.20/539,680.86 = 343,687.16/x
  3. Step 3: Cross multiply
    392,304.20x = 539,680.86 × 343,687.16
  4. Step 4: Simplify right side
    392,304.20x = 185,481,382,079.76
  5. Step 5: Solve for x
    x = 185,481,382,079.76/392,304.20
  6. Step 6: Final answer
    x = 472,799.89

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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.