Home / 2,102.78-2,901.23-1,357.18

Finding the Fourth Proportional to 2,102.78, 2,901.23 and 1,357.18

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Solution

The fourth proportional to 2,102.78, 2,901.23 and 1,357.18 is: 1,872.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,102.78 : 2,901.23 = 1,357.18 : x
  2. Step 2: Convert to fraction form
    2,102.78/2,901.23 = 1,357.18/x
  3. Step 3: Cross multiply
    2,102.78x = 2,901.23 × 1,357.18
  4. Step 4: Simplify right side
    2,102.78x = 3,937,470.04
  5. Step 5: Solve for x
    x = 3,937,470.04/2,102.78
  6. Step 6: Final answer
    x = 1,872.51

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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.