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Finding the Fourth Proportional to 712.15, 1,068.30 and 249.88

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Solution

The fourth proportional to 712.15, 1,068.30 and 249.88 is: 374.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.15 : 1,068.30 = 249.88 : x
  2. Step 2: Convert to fraction form
    712.15/1,068.30 = 249.88/x
  3. Step 3: Cross multiply
    712.15x = 1,068.30 × 249.88
  4. Step 4: Simplify right side
    712.15x = 266,944.13
  5. Step 5: Solve for x
    x = 266,944.13/712.15
  6. Step 6: Final answer
    x = 374.84

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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.