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Finding the Fourth Proportional to 1,806.88, 2,706.30 and 1,393

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Solution

The fourth proportional to 1,806.88, 2,706.30 and 1,393 is: 2,086.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,806.88 : 2,706.30 = 1,393 : x
  2. Step 2: Convert to fraction form
    1,806.88/2,706.30 = 1,393/x
  3. Step 3: Cross multiply
    1,806.88x = 2,706.30 × 1,393
  4. Step 4: Simplify right side
    1,806.88x = 3,769,875.90
  5. Step 5: Solve for x
    x = 3,769,875.90/1,806.88
  6. Step 6: Final answer
    x = 2,086.40

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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.