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Finding the Fourth Proportional to 936.20, 1,291.92 and 537.93

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Solution

The fourth proportional to 936.20, 1,291.92 and 537.93 is: 742.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.20 : 1,291.92 = 537.93 : x
  2. Step 2: Convert to fraction form
    936.20/1,291.92 = 537.93/x
  3. Step 3: Cross multiply
    936.20x = 1,291.92 × 537.93
  4. Step 4: Simplify right side
    936.20x = 694,962.53
  5. Step 5: Solve for x
    x = 694,962.53/936.20
  6. Step 6: Final answer
    x = 742.32

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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.