Home / 396,989.07-547,838.28-215,703.78

Finding the Fourth Proportional to 396,989.07, 547,838.28 and 215,703.78

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Solution

The fourth proportional to 396,989.07, 547,838.28 and 215,703.78 is: 297,667.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,989.07 : 547,838.28 = 215,703.78 : x
  2. Step 2: Convert to fraction form
    396,989.07/547,838.28 = 215,703.78/x
  3. Step 3: Cross multiply
    396,989.07x = 547,838.28 × 215,703.78
  4. Step 4: Simplify right side
    396,989.07x = 118,170,787,824.70
  5. Step 5: Solve for x
    x = 118,170,787,824.70/396,989.07
  6. Step 6: Final answer
    x = 297,667.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.