Home / 3,280.20-4,924.80-2,117.40

Finding the Fourth Proportional to 3,280.20, 4,924.80 and 2,117.40

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Solution

The fourth proportional to 3,280.20, 4,924.80 and 2,117.40 is: 3,179.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.20 : 4,924.80 = 2,117.40 : x
  2. Step 2: Convert to fraction form
    3,280.20/4,924.80 = 2,117.40/x
  3. Step 3: Cross multiply
    3,280.20x = 4,924.80 × 2,117.40
  4. Step 4: Simplify right side
    3,280.20x = 10,427,771.52
  5. Step 5: Solve for x
    x = 10,427,771.52/3,280.20
  6. Step 6: Final answer
    x = 3,179.00

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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.