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Finding the Fourth Proportional to 576.62, 865.20 and 316.58

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Solution

The fourth proportional to 576.62, 865.20 and 316.58 is: 475.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.62 : 865.20 = 316.58 : x
  2. Step 2: Convert to fraction form
    576.62/865.20 = 316.58/x
  3. Step 3: Cross multiply
    576.62x = 865.20 × 316.58
  4. Step 4: Simplify right side
    576.62x = 273,905.02
  5. Step 5: Solve for x
    x = 273,905.02/576.62
  6. Step 6: Final answer
    x = 475.02

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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.