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Finding the Fourth Proportional to 2,978.01, 4,471.11 and 1,518.18

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Solution

The fourth proportional to 2,978.01, 4,471.11 and 1,518.18 is: 2,279.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,978.01 : 4,471.11 = 1,518.18 : x
  2. Step 2: Convert to fraction form
    2,978.01/4,471.11 = 1,518.18/x
  3. Step 3: Cross multiply
    2,978.01x = 4,471.11 × 1,518.18
  4. Step 4: Simplify right side
    2,978.01x = 6,787,949.78
  5. Step 5: Solve for x
    x = 6,787,949.78/2,978.01
  6. Step 6: Final answer
    x = 2,279.36

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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.