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Finding the Fourth Proportional to 496.65, 744.88 and 172.11

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Solution

The fourth proportional to 496.65, 744.88 and 172.11 is: 258.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.65 : 744.88 = 172.11 : x
  2. Step 2: Convert to fraction form
    496.65/744.88 = 172.11/x
  3. Step 3: Cross multiply
    496.65x = 744.88 × 172.11
  4. Step 4: Simplify right side
    496.65x = 128,201.30
  5. Step 5: Solve for x
    x = 128,201.30/496.65
  6. Step 6: Final answer
    x = 258.13

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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.