Home / 688.27-1,031.68-322.75

Finding the Fourth Proportional to 688.27, 1,031.68 and 322.75

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Solution

The fourth proportional to 688.27, 1,031.68 and 322.75 is: 483.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.27 : 1,031.68 = 322.75 : x
  2. Step 2: Convert to fraction form
    688.27/1,031.68 = 322.75/x
  3. Step 3: Cross multiply
    688.27x = 1,031.68 × 322.75
  4. Step 4: Simplify right side
    688.27x = 332,974.72
  5. Step 5: Solve for x
    x = 332,974.72/688.27
  6. Step 6: Final answer
    x = 483.79

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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.