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Finding the Fourth Proportional to 3,209.64, 4,812.10 and 1,429.94

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Solution

The fourth proportional to 3,209.64, 4,812.10 and 1,429.94 is: 2,143.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,209.64 : 4,812.10 = 1,429.94 : x
  2. Step 2: Convert to fraction form
    3,209.64/4,812.10 = 1,429.94/x
  3. Step 3: Cross multiply
    3,209.64x = 4,812.10 × 1,429.94
  4. Step 4: Simplify right side
    3,209.64x = 6,881,014.27
  5. Step 5: Solve for x
    x = 6,881,014.27/3,209.64
  6. Step 6: Final answer
    x = 2,143.86

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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.