Home / 2,166.13-2,989.55-1,222.11

Finding the Fourth Proportional to 2,166.13, 2,989.55 and 1,222.11

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Solution

The fourth proportional to 2,166.13, 2,989.55 and 1,222.11 is: 1,686.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,166.13 : 2,989.55 = 1,222.11 : x
  2. Step 2: Convert to fraction form
    2,166.13/2,989.55 = 1,222.11/x
  3. Step 3: Cross multiply
    2,166.13x = 2,989.55 × 1,222.11
  4. Step 4: Simplify right side
    2,166.13x = 3,653,558.95
  5. Step 5: Solve for x
    x = 3,653,558.95/2,166.13
  6. Step 6: Final answer
    x = 1,686.68

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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.