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Finding the Fourth Proportional to 1,838.50, 2,757.21 and 539.66

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Solution

The fourth proportional to 1,838.50, 2,757.21 and 539.66 is: 809.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,838.50 : 2,757.21 = 539.66 : x
  2. Step 2: Convert to fraction form
    1,838.50/2,757.21 = 539.66/x
  3. Step 3: Cross multiply
    1,838.50x = 2,757.21 × 539.66
  4. Step 4: Simplify right side
    1,838.50x = 1,487,955.95
  5. Step 5: Solve for x
    x = 1,487,955.95/1,838.50
  6. Step 6: Final answer
    x = 809.33

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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.