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Finding the Fourth Proportional to 936.97, 1,291.65 and 656.32

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Solution

The fourth proportional to 936.97, 1,291.65 and 656.32 is: 904.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.97 : 1,291.65 = 656.32 : x
  2. Step 2: Convert to fraction form
    936.97/1,291.65 = 656.32/x
  3. Step 3: Cross multiply
    936.97x = 1,291.65 × 656.32
  4. Step 4: Simplify right side
    936.97x = 847,735.73
  5. Step 5: Solve for x
    x = 847,735.73/936.97
  6. Step 6: Final answer
    x = 904.76

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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.