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Finding the Fourth Proportional to 724.88, 1,087.22 and 334.80

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Solution

The fourth proportional to 724.88, 1,087.22 and 334.80 is: 502.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.88 : 1,087.22 = 334.80 : x
  2. Step 2: Convert to fraction form
    724.88/1,087.22 = 334.80/x
  3. Step 3: Cross multiply
    724.88x = 1,087.22 × 334.80
  4. Step 4: Simplify right side
    724.88x = 364,002.09
  5. Step 5: Solve for x
    x = 364,002.09/724.88
  6. Step 6: Final answer
    x = 502.15

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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.