Home / 3,076.80-4,615.20-1,982.40

Finding the Fourth Proportional to 3,076.80, 4,615.20 and 1,982.40

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Solution

The fourth proportional to 3,076.80, 4,615.20 and 1,982.40 is: 2,973.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,076.80 : 4,615.20 = 1,982.40 : x
  2. Step 2: Convert to fraction form
    3,076.80/4,615.20 = 1,982.40/x
  3. Step 3: Cross multiply
    3,076.80x = 4,615.20 × 1,982.40
  4. Step 4: Simplify right side
    3,076.80x = 9,149,172.48
  5. Step 5: Solve for x
    x = 9,149,172.48/3,076.80
  6. Step 6: Final answer
    x = 2,973.60

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Similar ratio
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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.