Home / 3,221.60-4,828.72-1,272.80

Finding the Fourth Proportional to 3,221.60, 4,828.72 and 1,272.80

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Solution

The fourth proportional to 3,221.60, 4,828.72 and 1,272.80 is: 1,907.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,221.60 : 4,828.72 = 1,272.80 : x
  2. Step 2: Convert to fraction form
    3,221.60/4,828.72 = 1,272.80/x
  3. Step 3: Cross multiply
    3,221.60x = 4,828.72 × 1,272.80
  4. Step 4: Simplify right side
    3,221.60x = 6,145,994.82
  5. Step 5: Solve for x
    x = 6,145,994.82/3,221.60
  6. Step 6: Final answer
    x = 1,907.75

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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.