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Finding the Fourth Proportional to 718.79, 1,078.25 and 225.17

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Solution

The fourth proportional to 718.79, 1,078.25 and 225.17 is: 337.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.79 : 1,078.25 = 225.17 : x
  2. Step 2: Convert to fraction form
    718.79/1,078.25 = 225.17/x
  3. Step 3: Cross multiply
    718.79x = 1,078.25 × 225.17
  4. Step 4: Simplify right side
    718.79x = 242,789.55
  5. Step 5: Solve for x
    x = 242,789.55/718.79
  6. Step 6: Final answer
    x = 337.78

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.