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Finding the Fourth Proportional to 960.67, 1,325.48 and 645.38

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Solution

The fourth proportional to 960.67, 1,325.48 and 645.38 is: 890.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.67 : 1,325.48 = 645.38 : x
  2. Step 2: Convert to fraction form
    960.67/1,325.48 = 645.38/x
  3. Step 3: Cross multiply
    960.67x = 1,325.48 × 645.38
  4. Step 4: Simplify right side
    960.67x = 855,438.28
  5. Step 5: Solve for x
    x = 855,438.28/960.67
  6. Step 6: Final answer
    x = 890.46

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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.