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Finding the Fourth Proportional to 453.28, 681.20 and 291.36

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Solution

The fourth proportional to 453.28, 681.20 and 291.36 is: 437.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.28 : 681.20 = 291.36 : x
  2. Step 2: Convert to fraction form
    453.28/681.20 = 291.36/x
  3. Step 3: Cross multiply
    453.28x = 681.20 × 291.36
  4. Step 4: Simplify right side
    453.28x = 198,474.43
  5. Step 5: Solve for x
    x = 198,474.43/453.28
  6. Step 6: Final answer
    x = 437.86

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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.