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Finding the Fourth Proportional to 2,840.76, 3,921.36 and 2,748.48

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Solution

The fourth proportional to 2,840.76, 3,921.36 and 2,748.48 is: 3,793.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.76 : 3,921.36 = 2,748.48 : x
  2. Step 2: Convert to fraction form
    2,840.76/3,921.36 = 2,748.48/x
  3. Step 3: Cross multiply
    2,840.76x = 3,921.36 × 2,748.48
  4. Step 4: Simplify right side
    2,840.76x = 10,777,779.53
  5. Step 5: Solve for x
    x = 10,777,779.53/2,840.76
  6. Step 6: Final answer
    x = 3,793.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.