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Finding the Fourth Proportional to 1,987.88, 2,744.04 and 1,491.95

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Solution

The fourth proportional to 1,987.88, 2,744.04 and 1,491.95 is: 2,059.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.88 : 2,744.04 = 1,491.95 : x
  2. Step 2: Convert to fraction form
    1,987.88/2,744.04 = 1,491.95/x
  3. Step 3: Cross multiply
    1,987.88x = 2,744.04 × 1,491.95
  4. Step 4: Simplify right side
    1,987.88x = 4,093,970.48
  5. Step 5: Solve for x
    x = 4,093,970.48/1,987.88
  6. Step 6: Final answer
    x = 2,059.47

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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.