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Finding the Fourth Proportional to 461.22, 691.65 and 316.98

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Solution

The fourth proportional to 461.22, 691.65 and 316.98 is: 475.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.22 : 691.65 = 316.98 : x
  2. Step 2: Convert to fraction form
    461.22/691.65 = 316.98/x
  3. Step 3: Cross multiply
    461.22x = 691.65 × 316.98
  4. Step 4: Simplify right side
    461.22x = 219,239.22
  5. Step 5: Solve for x
    x = 219,239.22/461.22
  6. Step 6: Final answer
    x = 475.35

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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.