Home / 2,166.38-2,989.47-1,222.32

Finding the Fourth Proportional to 2,166.38, 2,989.47 and 1,222.32

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Solution

The fourth proportional to 2,166.38, 2,989.47 and 1,222.32 is: 1,686.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,166.38 : 2,989.47 = 1,222.32 : x
  2. Step 2: Convert to fraction form
    2,166.38/2,989.47 = 1,222.32/x
  3. Step 3: Cross multiply
    2,166.38x = 2,989.47 × 1,222.32
  4. Step 4: Simplify right side
    2,166.38x = 3,654,088.97
  5. Step 5: Solve for x
    x = 3,654,088.97/2,166.38
  6. Step 6: Final answer
    x = 1,686.73

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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.