Home / 1,340.11-2,009.25-415.36

Finding the Fourth Proportional to 1,340.11, 2,009.25 and 415.36

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Solution

The fourth proportional to 1,340.11, 2,009.25 and 415.36 is: 622.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.11 : 2,009.25 = 415.36 : x
  2. Step 2: Convert to fraction form
    1,340.11/2,009.25 = 415.36/x
  3. Step 3: Cross multiply
    1,340.11x = 2,009.25 × 415.36
  4. Step 4: Simplify right side
    1,340.11x = 834,562.08
  5. Step 5: Solve for x
    x = 834,562.08/1,340.11
  6. Step 6: Final answer
    x = 622.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.