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Finding the Fourth Proportional to 587.66, 879.89 and 381.72

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Solution

The fourth proportional to 587.66, 879.89 and 381.72 is: 571.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.66 : 879.89 = 381.72 : x
  2. Step 2: Convert to fraction form
    587.66/879.89 = 381.72/x
  3. Step 3: Cross multiply
    587.66x = 879.89 × 381.72
  4. Step 4: Simplify right side
    587.66x = 335,865.30
  5. Step 5: Solve for x
    x = 335,865.30/587.66
  6. Step 6: Final answer
    x = 571.53

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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.