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Finding the Fourth Proportional to 3,429.84, 5,142.84 and 1,784.64

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Solution

The fourth proportional to 3,429.84, 5,142.84 and 1,784.64 is: 2,675.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,429.84 : 5,142.84 = 1,784.64 : x
  2. Step 2: Convert to fraction form
    3,429.84/5,142.84 = 1,784.64/x
  3. Step 3: Cross multiply
    3,429.84x = 5,142.84 × 1,784.64
  4. Step 4: Simplify right side
    3,429.84x = 9,178,117.98
  5. Step 5: Solve for x
    x = 9,178,117.98/3,429.84
  6. Step 6: Final answer
    x = 2,675.96

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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.