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Finding the Fourth Proportional to 1,807.91, 2,713.41 and 1,289.19

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Solution

The fourth proportional to 1,807.91, 2,713.41 and 1,289.19 is: 1,934.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,807.91 : 2,713.41 = 1,289.19 : x
  2. Step 2: Convert to fraction form
    1,807.91/2,713.41 = 1,289.19/x
  3. Step 3: Cross multiply
    1,807.91x = 2,713.41 × 1,289.19
  4. Step 4: Simplify right side
    1,807.91x = 3,498,087.47
  5. Step 5: Solve for x
    x = 3,498,087.47/1,807.91
  6. Step 6: Final answer
    x = 1,934.88

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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.