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Finding the Fourth Proportional to 2,707.78, 4,063.26 and 1,720.55

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Solution

The fourth proportional to 2,707.78, 4,063.26 and 1,720.55 is: 2,581.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,707.78 : 4,063.26 = 1,720.55 : x
  2. Step 2: Convert to fraction form
    2,707.78/4,063.26 = 1,720.55/x
  3. Step 3: Cross multiply
    2,707.78x = 4,063.26 × 1,720.55
  4. Step 4: Simplify right side
    2,707.78x = 6,991,041.99
  5. Step 5: Solve for x
    x = 6,991,041.99/2,707.78
  6. Step 6: Final answer
    x = 2,581.84

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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.