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Finding the Fourth Proportional to 2,015.90, 3,024.87 and 920.12

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Solution

The fourth proportional to 2,015.90, 3,024.87 and 920.12 is: 1,380.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,015.90 : 3,024.87 = 920.12 : x
  2. Step 2: Convert to fraction form
    2,015.90/3,024.87 = 920.12/x
  3. Step 3: Cross multiply
    2,015.90x = 3,024.87 × 920.12
  4. Step 4: Simplify right side
    2,015.90x = 2,783,228.26
  5. Step 5: Solve for x
    x = 2,783,228.26/2,015.90
  6. Step 6: Final answer
    x = 1,380.64

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1.5x scale

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.