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Finding the Fourth Proportional to 936.95, 1,292.06 and 617.36

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Solution

The fourth proportional to 936.95, 1,292.06 and 617.36 is: 851.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.95 : 1,292.06 = 617.36 : x
  2. Step 2: Convert to fraction form
    936.95/1,292.06 = 617.36/x
  3. Step 3: Cross multiply
    936.95x = 1,292.06 × 617.36
  4. Step 4: Simplify right side
    936.95x = 797,661.24
  5. Step 5: Solve for x
    x = 797,661.24/936.95
  6. Step 6: Final answer
    x = 851.34

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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.