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Finding the Fourth Proportional to 581.20, 871.18 and 191.10

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Solution

The fourth proportional to 581.20, 871.18 and 191.10 is: 286.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.20 : 871.18 = 191.10 : x
  2. Step 2: Convert to fraction form
    581.20/871.18 = 191.10/x
  3. Step 3: Cross multiply
    581.20x = 871.18 × 191.10
  4. Step 4: Simplify right side
    581.20x = 166,478.14
  5. Step 5: Solve for x
    x = 166,478.14/581.20
  6. Step 6: Final answer
    x = 286.44

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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.