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Finding the Fourth Proportional to 944.28, 1,415.26 and 685.18

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Solution

The fourth proportional to 944.28, 1,415.26 and 685.18 is: 1,026.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    944.28 : 1,415.26 = 685.18 : x
  2. Step 2: Convert to fraction form
    944.28/1,415.26 = 685.18/x
  3. Step 3: Cross multiply
    944.28x = 1,415.26 × 685.18
  4. Step 4: Simplify right side
    944.28x = 969,707.85
  5. Step 5: Solve for x
    x = 969,707.85/944.28
  6. Step 6: Final answer
    x = 1,026.93

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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.