Home / 1,972.70-2,722.66-1,187.18

Finding the Fourth Proportional to 1,972.70, 2,722.66 and 1,187.18

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Solution

The fourth proportional to 1,972.70, 2,722.66 and 1,187.18 is: 1,638.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.70 : 2,722.66 = 1,187.18 : x
  2. Step 2: Convert to fraction form
    1,972.70/2,722.66 = 1,187.18/x
  3. Step 3: Cross multiply
    1,972.70x = 2,722.66 × 1,187.18
  4. Step 4: Simplify right side
    1,972.70x = 3,232,287.50
  5. Step 5: Solve for x
    x = 3,232,287.50/1,972.70
  6. Step 6: Final answer
    x = 1,638.51

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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.