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Finding the Fourth Proportional to 960.19, 1,440.28 and 310.94

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Solution

The fourth proportional to 960.19, 1,440.28 and 310.94 is: 466.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.19 : 1,440.28 = 310.94 : x
  2. Step 2: Convert to fraction form
    960.19/1,440.28 = 310.94/x
  3. Step 3: Cross multiply
    960.19x = 1,440.28 × 310.94
  4. Step 4: Simplify right side
    960.19x = 447,839.25
  5. Step 5: Solve for x
    x = 447,839.25/960.19
  6. Step 6: Final answer
    x = 466.41

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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.