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Finding the Fourth Proportional to 3,012.78, 4,513.05 and 2,760.78

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Solution

The fourth proportional to 3,012.78, 4,513.05 and 2,760.78 is: 4,135.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,012.78 : 4,513.05 = 2,760.78 : x
  2. Step 2: Convert to fraction form
    3,012.78/4,513.05 = 2,760.78/x
  3. Step 3: Cross multiply
    3,012.78x = 4,513.05 × 2,760.78
  4. Step 4: Simplify right side
    3,012.78x = 12,459,538.18
  5. Step 5: Solve for x
    x = 12,459,538.18/3,012.78
  6. Step 6: Final answer
    x = 4,135.56

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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.