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Finding the Fourth Proportional to 960.62, 1,439.70 and 613.82

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Solution

The fourth proportional to 960.62, 1,439.70 and 613.82 is: 919.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.62 : 1,439.70 = 613.82 : x
  2. Step 2: Convert to fraction form
    960.62/1,439.70 = 613.82/x
  3. Step 3: Cross multiply
    960.62x = 1,439.70 × 613.82
  4. Step 4: Simplify right side
    960.62x = 883,716.65
  5. Step 5: Solve for x
    x = 883,716.65/960.62
  6. Step 6: Final answer
    x = 919.94

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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.