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Finding the Fourth Proportional to 1,839.79, 2,759.69 and 542.17

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Solution

The fourth proportional to 1,839.79, 2,759.69 and 542.17 is: 813.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,839.79 : 2,759.69 = 542.17 : x
  2. Step 2: Convert to fraction form
    1,839.79/2,759.69 = 542.17/x
  3. Step 3: Cross multiply
    1,839.79x = 2,759.69 × 542.17
  4. Step 4: Simplify right side
    1,839.79x = 1,496,221.13
  5. Step 5: Solve for x
    x = 1,496,221.13/1,839.79
  6. Step 6: Final answer
    x = 813.26

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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.