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Finding the Fourth Proportional to 576.66, 864.85 and 165.79

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Solution

The fourth proportional to 576.66, 864.85 and 165.79 is: 248.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.66 : 864.85 = 165.79 : x
  2. Step 2: Convert to fraction form
    576.66/864.85 = 165.79/x
  3. Step 3: Cross multiply
    576.66x = 864.85 × 165.79
  4. Step 4: Simplify right side
    576.66x = 143,383.48
  5. Step 5: Solve for x
    x = 143,383.48/576.66
  6. Step 6: Final answer
    x = 248.64

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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.