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Finding the Fourth Proportional to 2,272.80, 3,404.40 and 1,840.80

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Solution

The fourth proportional to 2,272.80, 3,404.40 and 1,840.80 is: 2,757.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,272.80 : 3,404.40 = 1,840.80 : x
  2. Step 2: Convert to fraction form
    2,272.80/3,404.40 = 1,840.80/x
  3. Step 3: Cross multiply
    2,272.80x = 3,404.40 × 1,840.80
  4. Step 4: Simplify right side
    2,272.80x = 6,266,819.52
  5. Step 5: Solve for x
    x = 6,266,819.52/2,272.80
  6. Step 6: Final answer
    x = 2,757.31

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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.