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Finding the Fourth Proportional to 2,718.85, 3,751.99 and 1,539.90

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Solution

The fourth proportional to 2,718.85, 3,751.99 and 1,539.90 is: 2,125.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,718.85 : 3,751.99 = 1,539.90 : x
  2. Step 2: Convert to fraction form
    2,718.85/3,751.99 = 1,539.90/x
  3. Step 3: Cross multiply
    2,718.85x = 3,751.99 × 1,539.90
  4. Step 4: Simplify right side
    2,718.85x = 5,777,689.40
  5. Step 5: Solve for x
    x = 5,777,689.40/2,718.85
  6. Step 6: Final answer
    x = 2,125.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.