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Finding the Fourth Proportional to 712.17, 1,068.40 and 225.13

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Solution

The fourth proportional to 712.17, 1,068.40 and 225.13 is: 337.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.17 : 1,068.40 = 225.13 : x
  2. Step 2: Convert to fraction form
    712.17/1,068.40 = 225.13/x
  3. Step 3: Cross multiply
    712.17x = 1,068.40 × 225.13
  4. Step 4: Simplify right side
    712.17x = 240,525.10
  5. Step 5: Solve for x
    x = 240,525.10/712.17
  6. Step 6: Final answer
    x = 337.73

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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.