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Finding the Fourth Proportional to 581.16, 871.50 and 215.75

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Solution

The fourth proportional to 581.16, 871.50 and 215.75 is: 323.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.16 : 871.50 = 215.75 : x
  2. Step 2: Convert to fraction form
    581.16/871.50 = 215.75/x
  3. Step 3: Cross multiply
    581.16x = 871.50 × 215.75
  4. Step 4: Simplify right side
    581.16x = 188,026.13
  5. Step 5: Solve for x
    x = 188,026.13/581.16
  6. Step 6: Final answer
    x = 323.54

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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.