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Finding the Fourth Proportional to 709.14, 1,063.29 and 276.21

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Solution

The fourth proportional to 709.14, 1,063.29 and 276.21 is: 414.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.14 : 1,063.29 = 276.21 : x
  2. Step 2: Convert to fraction form
    709.14/1,063.29 = 276.21/x
  3. Step 3: Cross multiply
    709.14x = 1,063.29 × 276.21
  4. Step 4: Simplify right side
    709.14x = 293,691.33
  5. Step 5: Solve for x
    x = 293,691.33/709.14
  6. Step 6: Final answer
    x = 414.15

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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.