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Finding the Fourth Proportional to 960.39, 1,325.53 and 628.70

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Solution

The fourth proportional to 960.39, 1,325.53 and 628.70 is: 867.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.39 : 1,325.53 = 628.70 : x
  2. Step 2: Convert to fraction form
    960.39/1,325.53 = 628.70/x
  3. Step 3: Cross multiply
    960.39x = 1,325.53 × 628.70
  4. Step 4: Simplify right side
    960.39x = 833,354.87
  5. Step 5: Solve for x
    x = 833,354.87/960.39
  6. Step 6: Final answer
    x = 867.73

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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.