Home / 1,638.12-2,260.61-892.08

Finding the Fourth Proportional to 1,638.12, 2,260.61 and 892.08

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Solution

The fourth proportional to 1,638.12, 2,260.61 and 892.08 is: 1,231.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.12 : 2,260.61 = 892.08 : x
  2. Step 2: Convert to fraction form
    1,638.12/2,260.61 = 892.08/x
  3. Step 3: Cross multiply
    1,638.12x = 2,260.61 × 892.08
  4. Step 4: Simplify right side
    1,638.12x = 2,016,643.85
  5. Step 5: Solve for x
    x = 2,016,643.85/1,638.12
  6. Step 6: Final answer
    x = 1,231.07

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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.