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Finding the Fourth Proportional to 724.84, 1,087.94 and 359.89

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Solution

The fourth proportional to 724.84, 1,087.94 and 359.89 is: 540.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.84 : 1,087.94 = 359.89 : x
  2. Step 2: Convert to fraction form
    724.84/1,087.94 = 359.89/x
  3. Step 3: Cross multiply
    724.84x = 1,087.94 × 359.89
  4. Step 4: Simplify right side
    724.84x = 391,538.73
  5. Step 5: Solve for x
    x = 391,538.73/724.84
  6. Step 6: Final answer
    x = 540.17

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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.