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Finding the Fourth Proportional to 408.58, 564.05 and 277.66

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Solution

The fourth proportional to 408.58, 564.05 and 277.66 is: 383.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.58 : 564.05 = 277.66 : x
  2. Step 2: Convert to fraction form
    408.58/564.05 = 277.66/x
  3. Step 3: Cross multiply
    408.58x = 564.05 × 277.66
  4. Step 4: Simplify right side
    408.58x = 156,614.12
  5. Step 5: Solve for x
    x = 156,614.12/408.58
  6. Step 6: Final answer
    x = 383.31

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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.