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Finding the Fourth Proportional to 688.62, 1,031.64 and 596.28

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Solution

The fourth proportional to 688.62, 1,031.64 and 596.28 is: 893.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.62 : 1,031.64 = 596.28 : x
  2. Step 2: Convert to fraction form
    688.62/1,031.64 = 596.28/x
  3. Step 3: Cross multiply
    688.62x = 1,031.64 × 596.28
  4. Step 4: Simplify right side
    688.62x = 615,146.30
  5. Step 5: Solve for x
    x = 615,146.30/688.62
  6. Step 6: Final answer
    x = 893.30

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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.