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Finding the Fourth Proportional to 936.08, 1,291.71 and 581.97

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Solution

The fourth proportional to 936.08, 1,291.71 and 581.97 is: 803.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.08 : 1,291.71 = 581.97 : x
  2. Step 2: Convert to fraction form
    936.08/1,291.71 = 581.97/x
  3. Step 3: Cross multiply
    936.08x = 1,291.71 × 581.97
  4. Step 4: Simplify right side
    936.08x = 751,736.47
  5. Step 5: Solve for x
    x = 751,736.47/936.08
  6. Step 6: Final answer
    x = 803.07

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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.