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Finding the Fourth Proportional to 984.28, 1,358.03 and 635.17

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Solution

The fourth proportional to 984.28, 1,358.03 and 635.17 is: 876.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.28 : 1,358.03 = 635.17 : x
  2. Step 2: Convert to fraction form
    984.28/1,358.03 = 635.17/x
  3. Step 3: Cross multiply
    984.28x = 1,358.03 × 635.17
  4. Step 4: Simplify right side
    984.28x = 862,579.92
  5. Step 5: Solve for x
    x = 862,579.92/984.28
  6. Step 6: Final answer
    x = 876.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.