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Finding the Fourth Proportional to 845.15, 1,268.62 and 748.25

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Solution

The fourth proportional to 845.15, 1,268.62 and 748.25 is: 1,123.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.15 : 1,268.62 = 748.25 : x
  2. Step 2: Convert to fraction form
    845.15/1,268.62 = 748.25/x
  3. Step 3: Cross multiply
    845.15x = 1,268.62 × 748.25
  4. Step 4: Simplify right side
    845.15x = 949,241.46
  5. Step 5: Solve for x
    x = 949,241.46/845.15
  6. Step 6: Final answer
    x = 1,123.17

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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.