Home / 2,981.80-4,469.10-1,520.20

Finding the Fourth Proportional to 2,981.80, 4,469.10 and 1,520.20

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Solution

The fourth proportional to 2,981.80, 4,469.10 and 1,520.20 is: 2,278.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981.80 : 4,469.10 = 1,520.20 : x
  2. Step 2: Convert to fraction form
    2,981.80/4,469.10 = 1,520.20/x
  3. Step 3: Cross multiply
    2,981.80x = 4,469.10 × 1,520.20
  4. Step 4: Simplify right side
    2,981.80x = 6,793,925.82
  5. Step 5: Solve for x
    x = 6,793,925.82/2,981.80
  6. Step 6: Final answer
    x = 2,278.46

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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.