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Finding the Fourth Proportional to 960.19, 1,439.79 and 310.84

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Solution

The fourth proportional to 960.19, 1,439.79 and 310.84 is: 466.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.19 : 1,439.79 = 310.84 : x
  2. Step 2: Convert to fraction form
    960.19/1,439.79 = 310.84/x
  3. Step 3: Cross multiply
    960.19x = 1,439.79 × 310.84
  4. Step 4: Simplify right side
    960.19x = 447,544.32
  5. Step 5: Solve for x
    x = 447,544.32/960.19
  6. Step 6: Final answer
    x = 466.10

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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.