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Finding the Fourth Proportional to 5,643.44, 7,789.20 and 3,550.40

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Solution

The fourth proportional to 5,643.44, 7,789.20 and 3,550.40 is: 4,900.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,643.44 : 7,789.20 = 3,550.40 : x
  2. Step 2: Convert to fraction form
    5,643.44/7,789.20 = 3,550.40/x
  3. Step 3: Cross multiply
    5,643.44x = 7,789.20 × 3,550.40
  4. Step 4: Simplify right side
    5,643.44x = 27,654,775.68
  5. Step 5: Solve for x
    x = 27,654,775.68/5,643.44
  6. Step 6: Final answer
    x = 4,900.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.