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Finding the Fourth Proportional to 1,808.72, 2,713.07 and 1,079.72

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Solution

The fourth proportional to 1,808.72, 2,713.07 and 1,079.72 is: 1,619.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,808.72 : 2,713.07 = 1,079.72 : x
  2. Step 2: Convert to fraction form
    1,808.72/2,713.07 = 1,079.72/x
  3. Step 3: Cross multiply
    1,808.72x = 2,713.07 × 1,079.72
  4. Step 4: Simplify right side
    1,808.72x = 2,929,336.98
  5. Step 5: Solve for x
    x = 2,929,336.98/1,808.72
  6. Step 6: Final answer
    x = 1,619.57

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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.