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Finding the Fourth Proportional to 3,390.30, 5,087.07 and 2,661.30

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Solution

The fourth proportional to 3,390.30, 5,087.07 and 2,661.30 is: 3,993.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.30 : 5,087.07 = 2,661.30 : x
  2. Step 2: Convert to fraction form
    3,390.30/5,087.07 = 2,661.30/x
  3. Step 3: Cross multiply
    3,390.30x = 5,087.07 × 2,661.30
  4. Step 4: Simplify right side
    3,390.30x = 13,538,219.39
  5. Step 5: Solve for x
    x = 13,538,219.39/3,390.30
  6. Step 6: Final answer
    x = 3,993.22

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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.