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Finding the Fourth Proportional to 581.29, 871.67 and 361.91

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Solution

The fourth proportional to 581.29, 871.67 and 361.91 is: 542.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.29 : 871.67 = 361.91 : x
  2. Step 2: Convert to fraction form
    581.29/871.67 = 361.91/x
  3. Step 3: Cross multiply
    581.29x = 871.67 × 361.91
  4. Step 4: Simplify right side
    581.29x = 315,464.28
  5. Step 5: Solve for x
    x = 315,464.28/581.29
  6. Step 6: Final answer
    x = 542.70

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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.