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Finding the Fourth Proportional to 960.54, 1,440.74 and 276.54

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Solution

The fourth proportional to 960.54, 1,440.74 and 276.54 is: 414.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.54 : 1,440.74 = 276.54 : x
  2. Step 2: Convert to fraction form
    960.54/1,440.74 = 276.54/x
  3. Step 3: Cross multiply
    960.54x = 1,440.74 × 276.54
  4. Step 4: Simplify right side
    960.54x = 398,422.24
  5. Step 5: Solve for x
    x = 398,422.24/960.54
  6. Step 6: Final answer
    x = 414.79

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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.