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Finding the Fourth Proportional to 3,980.88, 5,958.99 and 3,390.39

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Solution

The fourth proportional to 3,980.88, 5,958.99 and 3,390.39 is: 5,075.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.88 : 5,958.99 = 3,390.39 : x
  2. Step 2: Convert to fraction form
    3,980.88/5,958.99 = 3,390.39/x
  3. Step 3: Cross multiply
    3,980.88x = 5,958.99 × 3,390.39
  4. Step 4: Simplify right side
    3,980.88x = 20,203,300.11
  5. Step 5: Solve for x
    x = 20,203,300.11/3,980.88
  6. Step 6: Final answer
    x = 5,075.08

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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.