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Finding the Fourth Proportional to 3,475.11, 5,212.63 and 878.02

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Solution

The fourth proportional to 3,475.11, 5,212.63 and 878.02 is: 1,317.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,475.11 : 5,212.63 = 878.02 : x
  2. Step 2: Convert to fraction form
    3,475.11/5,212.63 = 878.02/x
  3. Step 3: Cross multiply
    3,475.11x = 5,212.63 × 878.02
  4. Step 4: Simplify right side
    3,475.11x = 4,576,793.39
  5. Step 5: Solve for x
    x = 4,576,793.39/3,475.11
  6. Step 6: Final answer
    x = 1,317.02

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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.