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Finding the Fourth Proportional to 772.90, 1,159.54 and 225.09

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Solution

The fourth proportional to 772.90, 1,159.54 and 225.09 is: 337.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.90 : 1,159.54 = 225.09 : x
  2. Step 2: Convert to fraction form
    772.90/1,159.54 = 225.09/x
  3. Step 3: Cross multiply
    772.90x = 1,159.54 × 225.09
  4. Step 4: Simplify right side
    772.90x = 260,999.93
  5. Step 5: Solve for x
    x = 260,999.93/772.90
  6. Step 6: Final answer
    x = 337.69

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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.