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Finding the Fourth Proportional to 281.73, 389.21 and 240.71

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Solution

The fourth proportional to 281.73, 389.21 and 240.71 is: 332.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.73 : 389.21 = 240.71 : x
  2. Step 2: Convert to fraction form
    281.73/389.21 = 240.71/x
  3. Step 3: Cross multiply
    281.73x = 389.21 × 240.71
  4. Step 4: Simplify right side
    281.73x = 93,683.59
  5. Step 5: Solve for x
    x = 93,683.59/281.73
  6. Step 6: Final answer
    x = 332.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.