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Finding the Fourth Proportional to 782.27, 1,079.75 and 467.75

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Solution

The fourth proportional to 782.27, 1,079.75 and 467.75 is: 645.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.27 : 1,079.75 = 467.75 : x
  2. Step 2: Convert to fraction form
    782.27/1,079.75 = 467.75/x
  3. Step 3: Cross multiply
    782.27x = 1,079.75 × 467.75
  4. Step 4: Simplify right side
    782.27x = 505,045.33
  5. Step 5: Solve for x
    x = 505,045.33/782.27
  6. Step 6: Final answer
    x = 645.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.