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Finding the Fourth Proportional to 1,807.58, 2,707.87 and 1,189.42

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Solution

The fourth proportional to 1,807.58, 2,707.87 and 1,189.42 is: 1,781.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,807.58 : 2,707.87 = 1,189.42 : x
  2. Step 2: Convert to fraction form
    1,807.58/2,707.87 = 1,189.42/x
  3. Step 3: Cross multiply
    1,807.58x = 2,707.87 × 1,189.42
  4. Step 4: Simplify right side
    1,807.58x = 3,220,794.74
  5. Step 5: Solve for x
    x = 3,220,794.74/1,807.58
  6. Step 6: Final answer
    x = 1,781.83

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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.