Home / 3,314.80-4,972.20-2,148.40

Finding the Fourth Proportional to 3,314.80, 4,972.20 and 2,148.40

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Solution

The fourth proportional to 3,314.80, 4,972.20 and 2,148.40 is: 3,222.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,314.80 : 4,972.20 = 2,148.40 : x
  2. Step 2: Convert to fraction form
    3,314.80/4,972.20 = 2,148.40/x
  3. Step 3: Cross multiply
    3,314.80x = 4,972.20 × 2,148.40
  4. Step 4: Simplify right side
    3,314.80x = 10,682,274.48
  5. Step 5: Solve for x
    x = 10,682,274.48/3,314.80
  6. Step 6: Final answer
    x = 3,222.60

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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.