Home / 3,378.86-5,069.45-1,405.55

Finding the Fourth Proportional to 3,378.86, 5,069.45 and 1,405.55

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Solution

The fourth proportional to 3,378.86, 5,069.45 and 1,405.55 is: 2,108.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,378.86 : 5,069.45 = 1,405.55 : x
  2. Step 2: Convert to fraction form
    3,378.86/5,069.45 = 1,405.55/x
  3. Step 3: Cross multiply
    3,378.86x = 5,069.45 × 1,405.55
  4. Step 4: Simplify right side
    3,378.86x = 7,125,340.10
  5. Step 5: Solve for x
    x = 7,125,340.10/3,378.86
  6. Step 6: Final answer
    x = 2,108.80

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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.