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Finding the Fourth Proportional to 3,835.91, 5,756.97 and 1,987.51

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Solution

The fourth proportional to 3,835.91, 5,756.97 and 1,987.51 is: 2,982.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,835.91 : 5,756.97 = 1,987.51 : x
  2. Step 2: Convert to fraction form
    3,835.91/5,756.97 = 1,987.51/x
  3. Step 3: Cross multiply
    3,835.91x = 5,756.97 × 1,987.51
  4. Step 4: Simplify right side
    3,835.91x = 11,442,055.49
  5. Step 5: Solve for x
    x = 11,442,055.49/3,835.91
  6. Step 6: Final answer
    x = 2,982.88

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1.5x scale

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.