Home / 2,166.14-2,990.22-1,381.22

Finding the Fourth Proportional to 2,166.14, 2,990.22 and 1,381.22

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Solution

The fourth proportional to 2,166.14, 2,990.22 and 1,381.22 is: 1,906.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,166.14 : 2,990.22 = 1,381.22 : x
  2. Step 2: Convert to fraction form
    2,166.14/2,990.22 = 1,381.22/x
  3. Step 3: Cross multiply
    2,166.14x = 2,990.22 × 1,381.22
  4. Step 4: Simplify right side
    2,166.14x = 4,130,151.67
  5. Step 5: Solve for x
    x = 4,130,151.67/2,166.14
  6. Step 6: Final answer
    x = 1,906.69

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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.