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Finding the Fourth Proportional to 461.68, 691.50 and 346.25

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Solution

The fourth proportional to 461.68, 691.50 and 346.25 is: 518.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.68 : 691.50 = 346.25 : x
  2. Step 2: Convert to fraction form
    461.68/691.50 = 346.25/x
  3. Step 3: Cross multiply
    461.68x = 691.50 × 346.25
  4. Step 4: Simplify right side
    461.68x = 239,431.88
  5. Step 5: Solve for x
    x = 239,431.88/461.68
  6. Step 6: Final answer
    x = 518.61

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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.