Home / 2,412.92-3,619.40-1,318.20

Finding the Fourth Proportional to 2,412.92, 3,619.40 and 1,318.20

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Solution

The fourth proportional to 2,412.92, 3,619.40 and 1,318.20 is: 1,977.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,412.92 : 3,619.40 = 1,318.20 : x
  2. Step 2: Convert to fraction form
    2,412.92/3,619.40 = 1,318.20/x
  3. Step 3: Cross multiply
    2,412.92x = 3,619.40 × 1,318.20
  4. Step 4: Simplify right side
    2,412.92x = 4,771,086.49
  5. Step 5: Solve for x
    x = 4,771,086.49/2,412.92
  6. Step 6: Final answer
    x = 1,977.31

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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.