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Finding the Fourth Proportional to 591.39, 887.13 and 316.80

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Solution

The fourth proportional to 591.39, 887.13 and 316.80 is: 475.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.39 : 887.13 = 316.80 : x
  2. Step 2: Convert to fraction form
    591.39/887.13 = 316.80/x
  3. Step 3: Cross multiply
    591.39x = 887.13 × 316.80
  4. Step 4: Simplify right side
    591.39x = 281,042.78
  5. Step 5: Solve for x
    x = 281,042.78/591.39
  6. Step 6: Final answer
    x = 475.22

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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.