Home / 427,786.28-641,712.54-143,478.44

Finding the Fourth Proportional to 427,786.28, 641,712.54 and 143,478.44

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Solution

The fourth proportional to 427,786.28, 641,712.54 and 143,478.44 is: 215,228.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,786.28 : 641,712.54 = 143,478.44 : x
  2. Step 2: Convert to fraction form
    427,786.28/641,712.54 = 143,478.44/x
  3. Step 3: Cross multiply
    427,786.28x = 641,712.54 × 143,478.44
  4. Step 4: Simplify right side
    427,786.28x = 92,071,914,167.64
  5. Step 5: Solve for x
    x = 92,071,914,167.64/427,786.28
  6. Step 6: Final answer
    x = 215,228.77

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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.