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Finding the Fourth Proportional to 453.81, 681.13 and 280.81

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Solution

The fourth proportional to 453.81, 681.13 and 280.81 is: 421.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.81 : 681.13 = 280.81 : x
  2. Step 2: Convert to fraction form
    453.81/681.13 = 280.81/x
  3. Step 3: Cross multiply
    453.81x = 681.13 × 280.81
  4. Step 4: Simplify right side
    453.81x = 191,266.71
  5. Step 5: Solve for x
    x = 191,266.71/453.81
  6. Step 6: Final answer
    x = 421.47

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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.