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Finding the Fourth Proportional to 581.30, 871.18 and 321.36

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Solution

The fourth proportional to 581.30, 871.18 and 321.36 is: 481.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.30 : 871.18 = 321.36 : x
  2. Step 2: Convert to fraction form
    581.30/871.18 = 321.36/x
  3. Step 3: Cross multiply
    581.30x = 871.18 × 321.36
  4. Step 4: Simplify right side
    581.30x = 279,962.40
  5. Step 5: Solve for x
    x = 279,962.40/581.30
  6. Step 6: Final answer
    x = 481.61

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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.