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Finding the Fourth Proportional to 960.16, 1,439.38 and 343.77

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Solution

The fourth proportional to 960.16, 1,439.38 and 343.77 is: 515.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.16 : 1,439.38 = 343.77 : x
  2. Step 2: Convert to fraction form
    960.16/1,439.38 = 343.77/x
  3. Step 3: Cross multiply
    960.16x = 1,439.38 × 343.77
  4. Step 4: Simplify right side
    960.16x = 494,815.66
  5. Step 5: Solve for x
    x = 494,815.66/960.16
  6. Step 6: Final answer
    x = 515.35

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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.