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Finding the Fourth Proportional to 663.55, 995.19 and 252.59

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Solution

The fourth proportional to 663.55, 995.19 and 252.59 is: 378.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.55 : 995.19 = 252.59 : x
  2. Step 2: Convert to fraction form
    663.55/995.19 = 252.59/x
  3. Step 3: Cross multiply
    663.55x = 995.19 × 252.59
  4. Step 4: Simplify right side
    663.55x = 251,377.53
  5. Step 5: Solve for x
    x = 251,377.53/663.55
  6. Step 6: Final answer
    x = 378.84

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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.