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Finding the Fourth Proportional to 409.98, 615.69 and 281.82

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Solution

The fourth proportional to 409.98, 615.69 and 281.82 is: 423.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.98 : 615.69 = 281.82 : x
  2. Step 2: Convert to fraction form
    409.98/615.69 = 281.82/x
  3. Step 3: Cross multiply
    409.98x = 615.69 × 281.82
  4. Step 4: Simplify right side
    409.98x = 173,513.76
  5. Step 5: Solve for x
    x = 173,513.76/409.98
  6. Step 6: Final answer
    x = 423.22

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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.