Home / 3,220.40-4,825.20-2,124.20

Finding the Fourth Proportional to 3,220.40, 4,825.20 and 2,124.20

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Solution

The fourth proportional to 3,220.40, 4,825.20 and 2,124.20 is: 3,182.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,220.40 : 4,825.20 = 2,124.20 : x
  2. Step 2: Convert to fraction form
    3,220.40/4,825.20 = 2,124.20/x
  3. Step 3: Cross multiply
    3,220.40x = 4,825.20 × 2,124.20
  4. Step 4: Simplify right side
    3,220.40x = 10,249,689.84
  5. Step 5: Solve for x
    x = 10,249,689.84/3,220.40
  6. Step 6: Final answer
    x = 3,182.74

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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.