Home / 3,487.20-5,241.60-3,422.40

Finding the Fourth Proportional to 3,487.20, 5,241.60 and 3,422.40

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Solution

The fourth proportional to 3,487.20, 5,241.60 and 3,422.40 is: 5,144.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,487.20 : 5,241.60 = 3,422.40 : x
  2. Step 2: Convert to fraction form
    3,487.20/5,241.60 = 3,422.40/x
  3. Step 3: Cross multiply
    3,487.20x = 5,241.60 × 3,422.40
  4. Step 4: Simplify right side
    3,487.20x = 17,938,851.84
  5. Step 5: Solve for x
    x = 17,938,851.84/3,487.20
  6. Step 6: Final answer
    x = 5,144.20

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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.