Home / 2,229.13-3,076.76-1,389.39

Finding the Fourth Proportional to 2,229.13, 3,076.76 and 1,389.39

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Solution

The fourth proportional to 2,229.13, 3,076.76 and 1,389.39 is: 1,917.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,229.13 : 3,076.76 = 1,389.39 : x
  2. Step 2: Convert to fraction form
    2,229.13/3,076.76 = 1,389.39/x
  3. Step 3: Cross multiply
    2,229.13x = 3,076.76 × 1,389.39
  4. Step 4: Simplify right side
    2,229.13x = 4,274,811.51
  5. Step 5: Solve for x
    x = 4,274,811.51/2,229.13
  6. Step 6: Final answer
    x = 1,917.70

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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.