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Finding the Fourth Proportional to 2,619.52, 3,610.74 and 1,987.99

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Solution

The fourth proportional to 2,619.52, 3,610.74 and 1,987.99 is: 2,740.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.52 : 3,610.74 = 1,987.99 : x
  2. Step 2: Convert to fraction form
    2,619.52/3,610.74 = 1,987.99/x
  3. Step 3: Cross multiply
    2,619.52x = 3,610.74 × 1,987.99
  4. Step 4: Simplify right side
    2,619.52x = 7,178,115.01
  5. Step 5: Solve for x
    x = 7,178,115.01/2,619.52
  6. Step 6: Final answer
    x = 2,740.24

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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.