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Finding the Fourth Proportional to 576.99, 865.17 and 316.80

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Solution

The fourth proportional to 576.99, 865.17 and 316.80 is: 475.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.99 : 865.17 = 316.80 : x
  2. Step 2: Convert to fraction form
    576.99/865.17 = 316.80/x
  3. Step 3: Cross multiply
    576.99x = 865.17 × 316.80
  4. Step 4: Simplify right side
    576.99x = 274,085.86
  5. Step 5: Solve for x
    x = 274,085.86/576.99
  6. Step 6: Final answer
    x = 475.03

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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.