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Finding the Fourth Proportional to 960.09, 1,440.96 and 440.88

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Solution

The fourth proportional to 960.09, 1,440.96 and 440.88 is: 661.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.09 : 1,440.96 = 440.88 : x
  2. Step 2: Convert to fraction form
    960.09/1,440.96 = 440.88/x
  3. Step 3: Cross multiply
    960.09x = 1,440.96 × 440.88
  4. Step 4: Simplify right side
    960.09x = 635,290.44
  5. Step 5: Solve for x
    x = 635,290.44/960.09
  6. Step 6: Final answer
    x = 661.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.