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Finding the Fourth Proportional to 686.08, 1,031.73 and 547.57

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Solution

The fourth proportional to 686.08, 1,031.73 and 547.57 is: 823.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    686.08 : 1,031.73 = 547.57 : x
  2. Step 2: Convert to fraction form
    686.08/1,031.73 = 547.57/x
  3. Step 3: Cross multiply
    686.08x = 1,031.73 × 547.57
  4. Step 4: Simplify right side
    686.08x = 564,944.40
  5. Step 5: Solve for x
    x = 564,944.40/686.08
  6. Step 6: Final answer
    x = 823.44

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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.