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Finding the Fourth Proportional to 2,819.40, 4,230.90 and 1,649.40

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Solution

The fourth proportional to 2,819.40, 4,230.90 and 1,649.40 is: 2,475.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.40 : 4,230.90 = 1,649.40 : x
  2. Step 2: Convert to fraction form
    2,819.40/4,230.90 = 1,649.40/x
  3. Step 3: Cross multiply
    2,819.40x = 4,230.90 × 1,649.40
  4. Step 4: Simplify right side
    2,819.40x = 6,978,446.46
  5. Step 5: Solve for x
    x = 6,978,446.46/2,819.40
  6. Step 6: Final answer
    x = 2,475.15

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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.