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Finding the Fourth Proportional to 581.33, 871.61 and 191.20

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Solution

The fourth proportional to 581.33, 871.61 and 191.20 is: 286.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.33 : 871.61 = 191.20 : x
  2. Step 2: Convert to fraction form
    581.33/871.61 = 191.20/x
  3. Step 3: Cross multiply
    581.33x = 871.61 × 191.20
  4. Step 4: Simplify right side
    581.33x = 166,650.13
  5. Step 5: Solve for x
    x = 166,650.13/581.33
  6. Step 6: Final answer
    x = 286.67

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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.