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Finding the Fourth Proportional to 681, 1,021.10 and 372.32

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Solution

The fourth proportional to 681, 1,021.10 and 372.32 is: 558.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    681 : 1,021.10 = 372.32 : x
  2. Step 2: Convert to fraction form
    681/1,021.10 = 372.32/x
  3. Step 3: Cross multiply
    681x = 1,021.10 × 372.32
  4. Step 4: Simplify right side
    681x = 380,175.95
  5. Step 5: Solve for x
    x = 380,175.95/681
  6. Step 6: Final answer
    x = 558.26

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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.