Home / 2,012.40-3,015.90-1,038.78

Finding the Fourth Proportional to 2,012.40, 3,015.90 and 1,038.78

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Solution

The fourth proportional to 2,012.40, 3,015.90 and 1,038.78 is: 1,556.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,012.40 : 3,015.90 = 1,038.78 : x
  2. Step 2: Convert to fraction form
    2,012.40/3,015.90 = 1,038.78/x
  3. Step 3: Cross multiply
    2,012.40x = 3,015.90 × 1,038.78
  4. Step 4: Simplify right side
    2,012.40x = 3,132,856.60
  5. Step 5: Solve for x
    x = 3,132,856.60/2,012.40
  6. Step 6: Final answer
    x = 1,556.78

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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.