Home / 2,007.70-3,011.55-1,318.75

Finding the Fourth Proportional to 2,007.70, 3,011.55 and 1,318.75

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Solution

The fourth proportional to 2,007.70, 3,011.55 and 1,318.75 is: 1,978.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,007.70 : 3,011.55 = 1,318.75 : x
  2. Step 2: Convert to fraction form
    2,007.70/3,011.55 = 1,318.75/x
  3. Step 3: Cross multiply
    2,007.70x = 3,011.55 × 1,318.75
  4. Step 4: Simplify right side
    2,007.70x = 3,971,481.56
  5. Step 5: Solve for x
    x = 3,971,481.56/2,007.70
  6. Step 6: Final answer
    x = 1,978.13

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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.