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Finding the Fourth Proportional to 960.45, 1,440.78 and 344.34

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Solution

The fourth proportional to 960.45, 1,440.78 and 344.34 is: 516.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.45 : 1,440.78 = 344.34 : x
  2. Step 2: Convert to fraction form
    960.45/1,440.78 = 344.34/x
  3. Step 3: Cross multiply
    960.45x = 1,440.78 × 344.34
  4. Step 4: Simplify right side
    960.45x = 496,118.19
  5. Step 5: Solve for x
    x = 496,118.19/960.45
  6. Step 6: Final answer
    x = 516.55

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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.