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Finding the Fourth Proportional to 1,229.47, 1,842.28 and 818.33

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Solution

The fourth proportional to 1,229.47, 1,842.28 and 818.33 is: 1,226.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.47 : 1,842.28 = 818.33 : x
  2. Step 2: Convert to fraction form
    1,229.47/1,842.28 = 818.33/x
  3. Step 3: Cross multiply
    1,229.47x = 1,842.28 × 818.33
  4. Step 4: Simplify right side
    1,229.47x = 1,507,581.74
  5. Step 5: Solve for x
    x = 1,507,581.74/1,229.47
  6. Step 6: Final answer
    x = 1,226.21

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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.