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Finding the Fourth Proportional to 1,807.88, 2,707.80 and 1,394

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Solution

The fourth proportional to 1,807.88, 2,707.80 and 1,394 is: 2,087.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,807.88 : 2,707.80 = 1,394 : x
  2. Step 2: Convert to fraction form
    1,807.88/2,707.80 = 1,394/x
  3. Step 3: Cross multiply
    1,807.88x = 2,707.80 × 1,394
  4. Step 4: Simplify right side
    1,807.88x = 3,774,673.20
  5. Step 5: Solve for x
    x = 3,774,673.20/1,807.88
  6. Step 6: Final answer
    x = 2,087.90

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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.