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Finding the Fourth Proportional to 581.44, 872.14 and 191.47

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Solution

The fourth proportional to 581.44, 872.14 and 191.47 is: 287.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.44 : 872.14 = 191.47 : x
  2. Step 2: Convert to fraction form
    581.44/872.14 = 191.47/x
  3. Step 3: Cross multiply
    581.44x = 872.14 × 191.47
  4. Step 4: Simplify right side
    581.44x = 166,988.65
  5. Step 5: Solve for x
    x = 166,988.65/581.44
  6. Step 6: Final answer
    x = 287.20

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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.