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Finding the Fourth Proportional to 936.77, 1,301.67 and 926.64

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Solution

The fourth proportional to 936.77, 1,301.67 and 926.64 is: 1,287.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.77 : 1,301.67 = 926.64 : x
  2. Step 2: Convert to fraction form
    936.77/1,301.67 = 926.64/x
  3. Step 3: Cross multiply
    936.77x = 1,301.67 × 926.64
  4. Step 4: Simplify right side
    936.77x = 1,206,179.49
  5. Step 5: Solve for x
    x = 1,206,179.49/936.77
  6. Step 6: Final answer
    x = 1,287.60

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.