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Finding the Fourth Proportional to 960.24, 1,440.36 and 276.24

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Solution

The fourth proportional to 960.24, 1,440.36 and 276.24 is: 414.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.24 : 1,440.36 = 276.24 : x
  2. Step 2: Convert to fraction form
    960.24/1,440.36 = 276.24/x
  3. Step 3: Cross multiply
    960.24x = 1,440.36 × 276.24
  4. Step 4: Simplify right side
    960.24x = 397,885.05
  5. Step 5: Solve for x
    x = 397,885.05/960.24
  6. Step 6: Final answer
    x = 414.36

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Double scale
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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.