Home / 2,112.90-3,169.05-726.30

Finding the Fourth Proportional to 2,112.90, 3,169.05 and 726.30

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Solution

The fourth proportional to 2,112.90, 3,169.05 and 726.30 is: 1,089.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,112.90 : 3,169.05 = 726.30 : x
  2. Step 2: Convert to fraction form
    2,112.90/3,169.05 = 726.30/x
  3. Step 3: Cross multiply
    2,112.90x = 3,169.05 × 726.30
  4. Step 4: Simplify right side
    2,112.90x = 2,301,681.02
  5. Step 5: Solve for x
    x = 2,301,681.02/2,112.90
  6. Step 6: Final answer
    x = 1,089.35

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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.