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Finding the Fourth Proportional to 984.01, 1,358.49 and 611.14

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Solution

The fourth proportional to 984.01, 1,358.49 and 611.14 is: 843.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.01 : 1,358.49 = 611.14 : x
  2. Step 2: Convert to fraction form
    984.01/1,358.49 = 611.14/x
  3. Step 3: Cross multiply
    984.01x = 1,358.49 × 611.14
  4. Step 4: Simplify right side
    984.01x = 830,227.58
  5. Step 5: Solve for x
    x = 830,227.58/984.01
  6. Step 6: Final answer
    x = 843.72

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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.