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Finding the Fourth Proportional to 949.52, 1,310.28 and 687.44

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Solution

The fourth proportional to 949.52, 1,310.28 and 687.44 is: 948.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.52 : 1,310.28 = 687.44 : x
  2. Step 2: Convert to fraction form
    949.52/1,310.28 = 687.44/x
  3. Step 3: Cross multiply
    949.52x = 1,310.28 × 687.44
  4. Step 4: Simplify right side
    949.52x = 900,738.88
  5. Step 5: Solve for x
    x = 900,738.88/949.52
  6. Step 6: Final answer
    x = 948.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.