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Finding the Fourth Proportional to 681.34, 1,020.14 and 437.12

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Solution

The fourth proportional to 681.34, 1,020.14 and 437.12 is: 654.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.34 : 1,020.14 = 437.12 : x
  2. Step 2: Convert to fraction form
    681.34/1,020.14 = 437.12/x
  3. Step 3: Cross multiply
    681.34x = 1,020.14 × 437.12
  4. Step 4: Simplify right side
    681.34x = 445,923.60
  5. Step 5: Solve for x
    x = 445,923.60/681.34
  6. Step 6: Final answer
    x = 654.48

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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.