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Finding the Fourth Proportional to 1,143.20, 1,714.80 and 363.18

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Solution

The fourth proportional to 1,143.20, 1,714.80 and 363.18 is: 544.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,143.20 : 1,714.80 = 363.18 : x
  2. Step 2: Convert to fraction form
    1,143.20/1,714.80 = 363.18/x
  3. Step 3: Cross multiply
    1,143.20x = 1,714.80 × 363.18
  4. Step 4: Simplify right side
    1,143.20x = 622,781.06
  5. Step 5: Solve for x
    x = 622,781.06/1,143.20
  6. Step 6: Final answer
    x = 544.77

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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.