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Finding the Fourth Proportional to 936.56, 1,292.33 and 538.20

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Solution

The fourth proportional to 936.56, 1,292.33 and 538.20 is: 742.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.56 : 1,292.33 = 538.20 : x
  2. Step 2: Convert to fraction form
    936.56/1,292.33 = 538.20/x
  3. Step 3: Cross multiply
    936.56x = 1,292.33 × 538.20
  4. Step 4: Simplify right side
    936.56x = 695,532.01
  5. Step 5: Solve for x
    x = 695,532.01/936.56
  6. Step 6: Final answer
    x = 742.65

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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.