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Finding the Fourth Proportional to 936.98, 1,293.39 and 617.90

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Solution

The fourth proportional to 936.98, 1,293.39 and 617.90 is: 852.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.98 : 1,293.39 = 617.90 : x
  2. Step 2: Convert to fraction form
    936.98/1,293.39 = 617.90/x
  3. Step 3: Cross multiply
    936.98x = 1,293.39 × 617.90
  4. Step 4: Simplify right side
    936.98x = 799,182.26
  5. Step 5: Solve for x
    x = 799,182.26/936.98
  6. Step 6: Final answer
    x = 852.94

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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.