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Finding the Fourth Proportional to 1,838.50, 2,757.78 and 539.98

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Solution

The fourth proportional to 1,838.50, 2,757.78 and 539.98 is: 809.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,838.50 : 2,757.78 = 539.98 : x
  2. Step 2: Convert to fraction form
    1,838.50/2,757.78 = 539.98/x
  3. Step 3: Cross multiply
    1,838.50x = 2,757.78 × 539.98
  4. Step 4: Simplify right side
    1,838.50x = 1,489,146.04
  5. Step 5: Solve for x
    x = 1,489,146.04/1,838.50
  6. Step 6: Final answer
    x = 809.98

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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.