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Finding the Fourth Proportional to 3,355.68, 5,029.20 and 1,406.88

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Solution

The fourth proportional to 3,355.68, 5,029.20 and 1,406.88 is: 2,108.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,355.68 : 5,029.20 = 1,406.88 : x
  2. Step 2: Convert to fraction form
    3,355.68/5,029.20 = 1,406.88/x
  3. Step 3: Cross multiply
    3,355.68x = 5,029.20 × 1,406.88
  4. Step 4: Simplify right side
    3,355.68x = 7,075,480.90
  5. Step 5: Solve for x
    x = 7,075,480.90/3,355.68
  6. Step 6: Final answer
    x = 2,108.51

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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.