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Finding the Fourth Proportional to 717.96, 1,078.47 and 444.27

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Solution

The fourth proportional to 717.96, 1,078.47 and 444.27 is: 667.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.96 : 1,078.47 = 444.27 : x
  2. Step 2: Convert to fraction form
    717.96/1,078.47 = 444.27/x
  3. Step 3: Cross multiply
    717.96x = 1,078.47 × 444.27
  4. Step 4: Simplify right side
    717.96x = 479,131.87
  5. Step 5: Solve for x
    x = 479,131.87/717.96
  6. Step 6: Final answer
    x = 667.35

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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.