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Finding the Fourth Proportional to 772.75, 1,159.17 and 310.57

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Solution

The fourth proportional to 772.75, 1,159.17 and 310.57 is: 465.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.75 : 1,159.17 = 310.57 : x
  2. Step 2: Convert to fraction form
    772.75/1,159.17 = 310.57/x
  3. Step 3: Cross multiply
    772.75x = 1,159.17 × 310.57
  4. Step 4: Simplify right side
    772.75x = 360,003.43
  5. Step 5: Solve for x
    x = 360,003.43/772.75
  6. Step 6: Final answer
    x = 465.87

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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.