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Finding the Fourth Proportional to 688.04, 1,031.56 and 322.62

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Solution

The fourth proportional to 688.04, 1,031.56 and 322.62 is: 483.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.04 : 1,031.56 = 322.62 : x
  2. Step 2: Convert to fraction form
    688.04/1,031.56 = 322.62/x
  3. Step 3: Cross multiply
    688.04x = 1,031.56 × 322.62
  4. Step 4: Simplify right side
    688.04x = 332,801.08
  5. Step 5: Solve for x
    x = 332,801.08/688.04
  6. Step 6: Final answer
    x = 483.70

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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.