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Finding the Fourth Proportional to 845.55, 1,269.27 and 674.28

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Solution

The fourth proportional to 845.55, 1,269.27 and 674.28 is: 1,012.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.55 : 1,269.27 = 674.28 : x
  2. Step 2: Convert to fraction form
    845.55/1,269.27 = 674.28/x
  3. Step 3: Cross multiply
    845.55x = 1,269.27 × 674.28
  4. Step 4: Simplify right side
    845.55x = 855,843.38
  5. Step 5: Solve for x
    x = 855,843.38/845.55
  6. Step 6: Final answer
    x = 1,012.17

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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.