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Finding the Fourth Proportional to 3,608.40, 5,401.80 and 3,394.80

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Solution

The fourth proportional to 3,608.40, 5,401.80 and 3,394.80 is: 5,082.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,608.40 : 5,401.80 = 3,394.80 : x
  2. Step 2: Convert to fraction form
    3,608.40/5,401.80 = 3,394.80/x
  3. Step 3: Cross multiply
    3,608.40x = 5,401.80 × 3,394.80
  4. Step 4: Simplify right side
    3,608.40x = 18,338,030.64
  5. Step 5: Solve for x
    x = 18,338,030.64/3,608.40
  6. Step 6: Final answer
    x = 5,082.04

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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.