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Finding the Fourth Proportional to 697.68, 1,045.31 and 481.41

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Solution

The fourth proportional to 697.68, 1,045.31 and 481.41 is: 721.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.68 : 1,045.31 = 481.41 : x
  2. Step 2: Convert to fraction form
    697.68/1,045.31 = 481.41/x
  3. Step 3: Cross multiply
    697.68x = 1,045.31 × 481.41
  4. Step 4: Simplify right side
    697.68x = 503,220.28
  5. Step 5: Solve for x
    x = 503,220.28/697.68
  6. Step 6: Final answer
    x = 721.28

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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.