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Finding the Fourth Proportional to 3,643.26, 5,027.70 and 1,987.26

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Solution

The fourth proportional to 3,643.26, 5,027.70 and 1,987.26 is: 2,742.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,643.26 : 5,027.70 = 1,987.26 : x
  2. Step 2: Convert to fraction form
    3,643.26/5,027.70 = 1,987.26/x
  3. Step 3: Cross multiply
    3,643.26x = 5,027.70 × 1,987.26
  4. Step 4: Simplify right side
    3,643.26x = 9,991,347.10
  5. Step 5: Solve for x
    x = 9,991,347.10/3,643.26
  6. Step 6: Final answer
    x = 2,742.42

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1.5x scale

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.