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Finding the Fourth Proportional to 845.74, 1,268.66 and 229.51

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Solution

The fourth proportional to 845.74, 1,268.66 and 229.51 is: 344.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.74 : 1,268.66 = 229.51 : x
  2. Step 2: Convert to fraction form
    845.74/1,268.66 = 229.51/x
  3. Step 3: Cross multiply
    845.74x = 1,268.66 × 229.51
  4. Step 4: Simplify right side
    845.74x = 291,170.16
  5. Step 5: Solve for x
    x = 291,170.16/845.74
  6. Step 6: Final answer
    x = 344.28

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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.