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Finding the Fourth Proportional to 984.33, 1,357.91 and 611.75

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Solution

The fourth proportional to 984.33, 1,357.91 and 611.75 is: 843.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.33 : 1,357.91 = 611.75 : x
  2. Step 2: Convert to fraction form
    984.33/1,357.91 = 611.75/x
  3. Step 3: Cross multiply
    984.33x = 1,357.91 × 611.75
  4. Step 4: Simplify right side
    984.33x = 830,698.38
  5. Step 5: Solve for x
    x = 830,698.38/984.33
  6. Step 6: Final answer
    x = 843.92

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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.