Home / 4,221.20-6,330.40-1,447.36

Finding the Fourth Proportional to 4,221.20, 6,330.40 and 1,447.36

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Solution

The fourth proportional to 4,221.20, 6,330.40 and 1,447.36 is: 2,170.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,221.20 : 6,330.40 = 1,447.36 : x
  2. Step 2: Convert to fraction form
    4,221.20/6,330.40 = 1,447.36/x
  3. Step 3: Cross multiply
    4,221.20x = 6,330.40 × 1,447.36
  4. Step 4: Simplify right side
    4,221.20x = 9,162,367.74
  5. Step 5: Solve for x
    x = 9,162,367.74/4,221.20
  6. Step 6: Final answer
    x = 2,170.56

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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.