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Finding the Fourth Proportional to 396,392.16, 547,018.36 and 215,099.48

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Solution

The fourth proportional to 396,392.16, 547,018.36 and 215,099.48 is: 296,835.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,392.16 : 547,018.36 = 215,099.48 : x
  2. Step 2: Convert to fraction form
    396,392.16/547,018.36 = 215,099.48/x
  3. Step 3: Cross multiply
    396,392.16x = 547,018.36 × 215,099.48
  4. Step 4: Simplify right side
    396,392.16x = 117,663,364,786.45
  5. Step 5: Solve for x
    x = 117,663,364,786.45/396,392.16
  6. Step 6: Final answer
    x = 296,835.75

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1.5x scale

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.