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Finding the Fourth Proportional to 3,402.56, 5,103.82 and 1,921.11

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Solution

The fourth proportional to 3,402.56, 5,103.82 and 1,921.11 is: 2,881.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,402.56 : 5,103.82 = 1,921.11 : x
  2. Step 2: Convert to fraction form
    3,402.56/5,103.82 = 1,921.11/x
  3. Step 3: Cross multiply
    3,402.56x = 5,103.82 × 1,921.11
  4. Step 4: Simplify right side
    3,402.56x = 9,804,999.64
  5. Step 5: Solve for x
    x = 9,804,999.64/3,402.56
  6. Step 6: Final answer
    x = 2,881.65

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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.