Home / 1,340.90-2,009.16-1,289.65

Finding the Fourth Proportional to 1,340.90, 2,009.16 and 1,289.65

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Solution

The fourth proportional to 1,340.90, 2,009.16 and 1,289.65 is: 1,932.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.90 : 2,009.16 = 1,289.65 : x
  2. Step 2: Convert to fraction form
    1,340.90/2,009.16 = 1,289.65/x
  3. Step 3: Cross multiply
    1,340.90x = 2,009.16 × 1,289.65
  4. Step 4: Simplify right side
    1,340.90x = 2,591,113.01
  5. Step 5: Solve for x
    x = 2,591,113.01/1,340.90
  6. Step 6: Final answer
    x = 1,932.36

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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.