Home / 2,106.09-2,905.84-1,359.78

Finding the Fourth Proportional to 2,106.09, 2,905.84 and 1,359.78

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Solution

The fourth proportional to 2,106.09, 2,905.84 and 1,359.78 is: 1,876.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,106.09 : 2,905.84 = 1,359.78 : x
  2. Step 2: Convert to fraction form
    2,106.09/2,905.84 = 1,359.78/x
  3. Step 3: Cross multiply
    2,106.09x = 2,905.84 × 1,359.78
  4. Step 4: Simplify right side
    2,106.09x = 3,951,303.12
  5. Step 5: Solve for x
    x = 3,951,303.12/2,106.09
  6. Step 6: Final answer
    x = 1,876.13

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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.