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Finding the Fourth Proportional to 772.89, 1,159.31 and 225.05

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Solution

The fourth proportional to 772.89, 1,159.31 and 225.05 is: 337.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.89 : 1,159.31 = 225.05 : x
  2. Step 2: Convert to fraction form
    772.89/1,159.31 = 225.05/x
  3. Step 3: Cross multiply
    772.89x = 1,159.31 × 225.05
  4. Step 4: Simplify right side
    772.89x = 260,895.79
  5. Step 5: Solve for x
    x = 260,895.79/772.89
  6. Step 6: Final answer
    x = 337.56

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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.