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Finding the Fourth Proportional to 1,805.35, 2,707.34 and 709.12

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Solution

The fourth proportional to 1,805.35, 2,707.34 and 709.12 is: 1,063.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.35 : 2,707.34 = 709.12 : x
  2. Step 2: Convert to fraction form
    1,805.35/2,707.34 = 709.12/x
  3. Step 3: Cross multiply
    1,805.35x = 2,707.34 × 709.12
  4. Step 4: Simplify right side
    1,805.35x = 1,919,828.94
  5. Step 5: Solve for x
    x = 1,919,828.94/1,805.35
  6. Step 6: Final answer
    x = 1,063.41

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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.