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Finding the Fourth Proportional to 964.14, 1,440.84 and 717.90

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Solution

The fourth proportional to 964.14, 1,440.84 and 717.90 is: 1,072.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.14 : 1,440.84 = 717.90 : x
  2. Step 2: Convert to fraction form
    964.14/1,440.84 = 717.90/x
  3. Step 3: Cross multiply
    964.14x = 1,440.84 × 717.90
  4. Step 4: Simplify right side
    964.14x = 1,034,379.04
  5. Step 5: Solve for x
    x = 1,034,379.04/964.14
  6. Step 6: Final answer
    x = 1,072.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.