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Finding the Fourth Proportional to 460.68, 691.08 and 172.12

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Solution

The fourth proportional to 460.68, 691.08 and 172.12 is: 258.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.68 : 691.08 = 172.12 : x
  2. Step 2: Convert to fraction form
    460.68/691.08 = 172.12/x
  3. Step 3: Cross multiply
    460.68x = 691.08 × 172.12
  4. Step 4: Simplify right side
    460.68x = 118,948.69
  5. Step 5: Solve for x
    x = 118,948.69/460.68
  6. Step 6: Final answer
    x = 258.20

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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.