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Finding the Fourth Proportional to 3,619.70, 5,429.55 and 3,403.70

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Solution

The fourth proportional to 3,619.70, 5,429.55 and 3,403.70 is: 5,105.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.70 : 5,429.55 = 3,403.70 : x
  2. Step 2: Convert to fraction form
    3,619.70/5,429.55 = 3,403.70/x
  3. Step 3: Cross multiply
    3,619.70x = 5,429.55 × 3,403.70
  4. Step 4: Simplify right side
    3,619.70x = 18,480,559.34
  5. Step 5: Solve for x
    x = 18,480,559.34/3,619.70
  6. Step 6: Final answer
    x = 5,105.55

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1.5x scale

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.