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Finding the Fourth Proportional to 825.78, 1,236.18 and 500.16

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Solution

The fourth proportional to 825.78, 1,236.18 and 500.16 is: 748.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.78 : 1,236.18 = 500.16 : x
  2. Step 2: Convert to fraction form
    825.78/1,236.18 = 500.16/x
  3. Step 3: Cross multiply
    825.78x = 1,236.18 × 500.16
  4. Step 4: Simplify right side
    825.78x = 618,287.79
  5. Step 5: Solve for x
    x = 618,287.79/825.78
  6. Step 6: Final answer
    x = 748.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.