Home / 2,055.81-2,839.45-1,391.51

Finding the Fourth Proportional to 2,055.81, 2,839.45 and 1,391.51

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Solution

The fourth proportional to 2,055.81, 2,839.45 and 1,391.51 is: 1,921.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,055.81 : 2,839.45 = 1,391.51 : x
  2. Step 2: Convert to fraction form
    2,055.81/2,839.45 = 1,391.51/x
  3. Step 3: Cross multiply
    2,055.81x = 2,839.45 × 1,391.51
  4. Step 4: Simplify right side
    2,055.81x = 3,951,123.07
  5. Step 5: Solve for x
    x = 3,951,123.07/2,055.81
  6. Step 6: Final answer
    x = 1,921.93

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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.