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Finding the Fourth Proportional to 1,807.88, 2,494.11 and 1,217.39

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Solution

The fourth proportional to 1,807.88, 2,494.11 and 1,217.39 is: 1,679.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,807.88 : 2,494.11 = 1,217.39 : x
  2. Step 2: Convert to fraction form
    1,807.88/2,494.11 = 1,217.39/x
  3. Step 3: Cross multiply
    1,807.88x = 2,494.11 × 1,217.39
  4. Step 4: Simplify right side
    1,807.88x = 3,036,292.10
  5. Step 5: Solve for x
    x = 3,036,292.10/1,807.88
  6. Step 6: Final answer
    x = 1,679.48

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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.