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Finding the Fourth Proportional to 1,764.46, 2,647.94 and 725.41

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Solution

The fourth proportional to 1,764.46, 2,647.94 and 725.41 is: 1,088.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,764.46 : 2,647.94 = 725.41 : x
  2. Step 2: Convert to fraction form
    1,764.46/2,647.94 = 725.41/x
  3. Step 3: Cross multiply
    1,764.46x = 2,647.94 × 725.41
  4. Step 4: Simplify right side
    1,764.46x = 1,920,826.94
  5. Step 5: Solve for x
    x = 1,920,826.94/1,764.46
  6. Step 6: Final answer
    x = 1,088.62

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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.