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Finding the Fourth Proportional to 681.63, 1,021.54 and 248.37

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Solution

The fourth proportional to 681.63, 1,021.54 and 248.37 is: 372.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.63 : 1,021.54 = 248.37 : x
  2. Step 2: Convert to fraction form
    681.63/1,021.54 = 248.37/x
  3. Step 3: Cross multiply
    681.63x = 1,021.54 × 248.37
  4. Step 4: Simplify right side
    681.63x = 253,715.90
  5. Step 5: Solve for x
    x = 253,715.90/681.63
  6. Step 6: Final answer
    x = 372.22

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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.