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Finding the Fourth Proportional to 937.39, 1,293.19 and 688.27

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Solution

The fourth proportional to 937.39, 1,293.19 and 688.27 is: 949.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.39 : 1,293.19 = 688.27 : x
  2. Step 2: Convert to fraction form
    937.39/1,293.19 = 688.27/x
  3. Step 3: Cross multiply
    937.39x = 1,293.19 × 688.27
  4. Step 4: Simplify right side
    937.39x = 890,063.88
  5. Step 5: Solve for x
    x = 890,063.88/937.39
  6. Step 6: Final answer
    x = 949.51

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Half scale
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Double scale
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1.5x scale

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.