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Finding the Fourth Proportional to 5,390.88, 7,443.10 and 3,375.12

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Solution

The fourth proportional to 5,390.88, 7,443.10 and 3,375.12 is: 4,659.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.88 : 7,443.10 = 3,375.12 : x
  2. Step 2: Convert to fraction form
    5,390.88/7,443.10 = 3,375.12/x
  3. Step 3: Cross multiply
    5,390.88x = 7,443.10 × 3,375.12
  4. Step 4: Simplify right side
    5,390.88x = 25,121,355.67
  5. Step 5: Solve for x
    x = 25,121,355.67/5,390.88
  6. Step 6: Final answer
    x = 4,659.97

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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.