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Finding the Fourth Proportional to 671.04, 1,001.04 and 655.68

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Solution

The fourth proportional to 671.04, 1,001.04 and 655.68 is: 978.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.04 : 1,001.04 = 655.68 : x
  2. Step 2: Convert to fraction form
    671.04/1,001.04 = 655.68/x
  3. Step 3: Cross multiply
    671.04x = 1,001.04 × 655.68
  4. Step 4: Simplify right side
    671.04x = 656,361.91
  5. Step 5: Solve for x
    x = 656,361.91/671.04
  6. Step 6: Final answer
    x = 978.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.