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Finding the Fourth Proportional to 845.78, 1,268.52 and 229.40

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Solution

The fourth proportional to 845.78, 1,268.52 and 229.40 is: 344.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.78 : 1,268.52 = 229.40 : x
  2. Step 2: Convert to fraction form
    845.78/1,268.52 = 229.40/x
  3. Step 3: Cross multiply
    845.78x = 1,268.52 × 229.40
  4. Step 4: Simplify right side
    845.78x = 290,996.04
  5. Step 5: Solve for x
    x = 290,996.04/845.78
  6. Step 6: Final answer
    x = 344.06

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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.