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Finding the Fourth Proportional to 408.98, 564.10 and 284.66

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Solution

The fourth proportional to 408.98, 564.10 and 284.66 is: 392.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.98 : 564.10 = 284.66 : x
  2. Step 2: Convert to fraction form
    408.98/564.10 = 284.66/x
  3. Step 3: Cross multiply
    408.98x = 564.10 × 284.66
  4. Step 4: Simplify right side
    408.98x = 160,576.71
  5. Step 5: Solve for x
    x = 160,576.71/408.98
  6. Step 6: Final answer
    x = 392.63

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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.