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Finding the Fourth Proportional to 2,679.20, 4,018.80 and 1,901.60

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Solution

The fourth proportional to 2,679.20, 4,018.80 and 1,901.60 is: 2,852.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.20 : 4,018.80 = 1,901.60 : x
  2. Step 2: Convert to fraction form
    2,679.20/4,018.80 = 1,901.60/x
  3. Step 3: Cross multiply
    2,679.20x = 4,018.80 × 1,901.60
  4. Step 4: Simplify right side
    2,679.20x = 7,642,150.08
  5. Step 5: Solve for x
    x = 7,642,150.08/2,679.20
  6. Step 6: Final answer
    x = 2,852.40

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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.