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Finding the Fourth Proportional to 2,934.60, 4,401.90 and 2,821.20

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Solution

The fourth proportional to 2,934.60, 4,401.90 and 2,821.20 is: 4,231.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,934.60 : 4,401.90 = 2,821.20 : x
  2. Step 2: Convert to fraction form
    2,934.60/4,401.90 = 2,821.20/x
  3. Step 3: Cross multiply
    2,934.60x = 4,401.90 × 2,821.20
  4. Step 4: Simplify right side
    2,934.60x = 12,418,640.28
  5. Step 5: Solve for x
    x = 12,418,640.28/2,934.60
  6. Step 6: Final answer
    x = 4,231.80

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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.