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Finding the Fourth Proportional to 681.85, 1,021.87 and 248.59

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Solution

The fourth proportional to 681.85, 1,021.87 and 248.59 is: 372.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.85 : 1,021.87 = 248.59 : x
  2. Step 2: Convert to fraction form
    681.85/1,021.87 = 248.59/x
  3. Step 3: Cross multiply
    681.85x = 1,021.87 × 248.59
  4. Step 4: Simplify right side
    681.85x = 254,026.66
  5. Step 5: Solve for x
    x = 254,026.66/681.85
  6. Step 6: Final answer
    x = 372.56

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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.