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Finding the Fourth Proportional to 845.64, 1,269.39 and 614.64

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Solution

The fourth proportional to 845.64, 1,269.39 and 614.64 is: 922.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.64 : 1,269.39 = 614.64 : x
  2. Step 2: Convert to fraction form
    845.64/1,269.39 = 614.64/x
  3. Step 3: Cross multiply
    845.64x = 1,269.39 × 614.64
  4. Step 4: Simplify right side
    845.64x = 780,217.87
  5. Step 5: Solve for x
    x = 780,217.87/845.64
  6. Step 6: Final answer
    x = 922.64

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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.