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Finding the Fourth Proportional to 712.47, 1,068.84 and 225.57

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Solution

The fourth proportional to 712.47, 1,068.84 and 225.57 is: 338.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.47 : 1,068.84 = 225.57 : x
  2. Step 2: Convert to fraction form
    712.47/1,068.84 = 225.57/x
  3. Step 3: Cross multiply
    712.47x = 1,068.84 × 225.57
  4. Step 4: Simplify right side
    712.47x = 241,098.24
  5. Step 5: Solve for x
    x = 241,098.24/712.47
  6. Step 6: Final answer
    x = 338.40

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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.