Home / 3,429.12-5,142.60-1,784.78

Finding the Fourth Proportional to 3,429.12, 5,142.60 and 1,784.78

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Solution

The fourth proportional to 3,429.12, 5,142.60 and 1,784.78 is: 2,676.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,429.12 : 5,142.60 = 1,784.78 : x
  2. Step 2: Convert to fraction form
    3,429.12/5,142.60 = 1,784.78/x
  3. Step 3: Cross multiply
    3,429.12x = 5,142.60 × 1,784.78
  4. Step 4: Simplify right side
    3,429.12x = 9,178,409.63
  5. Step 5: Solve for x
    x = 9,178,409.63/3,429.12
  6. Step 6: Final answer
    x = 2,676.61

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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.