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Finding the Fourth Proportional to 1,891.38, 2,820.08 and 1,819.20

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Solution

The fourth proportional to 1,891.38, 2,820.08 and 1,819.20 is: 2,712.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891.38 : 2,820.08 = 1,819.20 : x
  2. Step 2: Convert to fraction form
    1,891.38/2,820.08 = 1,819.20/x
  3. Step 3: Cross multiply
    1,891.38x = 2,820.08 × 1,819.20
  4. Step 4: Simplify right side
    1,891.38x = 5,130,289.54
  5. Step 5: Solve for x
    x = 5,130,289.54/1,891.38
  6. Step 6: Final answer
    x = 2,712.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.