Home / 427,664.71-641,639.58-143,383.38

Finding the Fourth Proportional to 427,664.71, 641,639.58 and 143,383.38

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Solution

The fourth proportional to 427,664.71, 641,639.58 and 143,383.38 is: 215,122.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,664.71 : 641,639.58 = 143,383.38 : x
  2. Step 2: Convert to fraction form
    427,664.71/641,639.58 = 143,383.38/x
  3. Step 3: Cross multiply
    427,664.71x = 641,639.58 × 143,383.38
  4. Step 4: Simplify right side
    427,664.71x = 92,000,451,722.18
  5. Step 5: Solve for x
    x = 92,000,451,722.18/427,664.71
  6. Step 6: Final answer
    x = 215,122.85

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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.