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Finding the Fourth Proportional to 634.28, 867.74 and 631.54

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Solution

The fourth proportional to 634.28, 867.74 and 631.54 is: 863.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.28 : 867.74 = 631.54 : x
  2. Step 2: Convert to fraction form
    634.28/867.74 = 631.54/x
  3. Step 3: Cross multiply
    634.28x = 867.74 × 631.54
  4. Step 4: Simplify right side
    634.28x = 548,012.52
  5. Step 5: Solve for x
    x = 548,012.52/634.28
  6. Step 6: Final answer
    x = 863.99

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.