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Finding the Fourth Proportional to 943.25, 1,300.86 and 611.55

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Solution

The fourth proportional to 943.25, 1,300.86 and 611.55 is: 843.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.25 : 1,300.86 = 611.55 : x
  2. Step 2: Convert to fraction form
    943.25/1,300.86 = 611.55/x
  3. Step 3: Cross multiply
    943.25x = 1,300.86 × 611.55
  4. Step 4: Simplify right side
    943.25x = 795,540.93
  5. Step 5: Solve for x
    x = 795,540.93/943.25
  6. Step 6: Final answer
    x = 843.41

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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.