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Finding the Fourth Proportional to 581.56, 871.95 and 191.43

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Solution

The fourth proportional to 581.56, 871.95 and 191.43 is: 287.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.56 : 871.95 = 191.43 : x
  2. Step 2: Convert to fraction form
    581.56/871.95 = 191.43/x
  3. Step 3: Cross multiply
    581.56x = 871.95 × 191.43
  4. Step 4: Simplify right side
    581.56x = 166,914.16
  5. Step 5: Solve for x
    x = 166,914.16/581.56
  6. Step 6: Final answer
    x = 287.01

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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.