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Finding the Fourth Proportional to 960.60, 1,324.26 and 645.30

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Solution

The fourth proportional to 960.60, 1,324.26 and 645.30 is: 889.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.60 : 1,324.26 = 645.30 : x
  2. Step 2: Convert to fraction form
    960.60/1,324.26 = 645.30/x
  3. Step 3: Cross multiply
    960.60x = 1,324.26 × 645.30
  4. Step 4: Simplify right side
    960.60x = 854,544.98
  5. Step 5: Solve for x
    x = 854,544.98/960.60
  6. Step 6: Final answer
    x = 889.60

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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.