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Finding the Fourth Proportional to 3,991.68, 5,510.02 and 3,429.88

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Solution

The fourth proportional to 3,991.68, 5,510.02 and 3,429.88 is: 4,734.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.68 : 5,510.02 = 3,429.88 : x
  2. Step 2: Convert to fraction form
    3,991.68/5,510.02 = 3,429.88/x
  3. Step 3: Cross multiply
    3,991.68x = 5,510.02 × 3,429.88
  4. Step 4: Simplify right side
    3,991.68x = 18,898,707.40
  5. Step 5: Solve for x
    x = 18,898,707.40/3,991.68
  6. Step 6: Final answer
    x = 4,734.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.