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Finding the Fourth Proportional to 936.21, 1,290.24 and 750.31

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Solution

The fourth proportional to 936.21, 1,290.24 and 750.31 is: 1,034.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.21 : 1,290.24 = 750.31 : x
  2. Step 2: Convert to fraction form
    936.21/1,290.24 = 750.31/x
  3. Step 3: Cross multiply
    936.21x = 1,290.24 × 750.31
  4. Step 4: Simplify right side
    936.21x = 968,079.97
  5. Step 5: Solve for x
    x = 968,079.97/936.21
  6. Step 6: Final answer
    x = 1,034.05

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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.