Home / 1,987.24-2,975.08-1,336.80

Finding the Fourth Proportional to 1,987.24, 2,975.08 and 1,336.80

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Solution

The fourth proportional to 1,987.24, 2,975.08 and 1,336.80 is: 2,001.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.24 : 2,975.08 = 1,336.80 : x
  2. Step 2: Convert to fraction form
    1,987.24/2,975.08 = 1,336.80/x
  3. Step 3: Cross multiply
    1,987.24x = 2,975.08 × 1,336.80
  4. Step 4: Simplify right side
    1,987.24x = 3,977,086.94
  5. Step 5: Solve for x
    x = 3,977,086.94/1,987.24
  6. Step 6: Final answer
    x = 2,001.31

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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.