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Finding the Fourth Proportional to 960.41, 1,323.96 and 679.78

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Solution

The fourth proportional to 960.41, 1,323.96 and 679.78 is: 937.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.41 : 1,323.96 = 679.78 : x
  2. Step 2: Convert to fraction form
    960.41/1,323.96 = 679.78/x
  3. Step 3: Cross multiply
    960.41x = 1,323.96 × 679.78
  4. Step 4: Simplify right side
    960.41x = 900,001.53
  5. Step 5: Solve for x
    x = 900,001.53/960.41
  6. Step 6: Final answer
    x = 937.10

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.