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Finding the Fourth Proportional to 709.68, 1,064.17 and 247.49

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Solution

The fourth proportional to 709.68, 1,064.17 and 247.49 is: 371.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.68 : 1,064.17 = 247.49 : x
  2. Step 2: Convert to fraction form
    709.68/1,064.17 = 247.49/x
  3. Step 3: Cross multiply
    709.68x = 1,064.17 × 247.49
  4. Step 4: Simplify right side
    709.68x = 263,365.49
  5. Step 5: Solve for x
    x = 263,365.49/709.68
  6. Step 6: Final answer
    x = 371.10

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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.