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Finding the Fourth Proportional to 396,817.88, 547,612.64 and 215,533.34

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Solution

The fourth proportional to 396,817.88, 547,612.64 and 215,533.34 is: 297,438.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,817.88 : 547,612.64 = 215,533.34 : x
  2. Step 2: Convert to fraction form
    396,817.88/547,612.64 = 215,533.34/x
  3. Step 3: Cross multiply
    396,817.88x = 547,612.64 × 215,533.34
  4. Step 4: Simplify right side
    396,817.88x = 118,028,781,325.42
  5. Step 5: Solve for x
    x = 118,028,781,325.42/396,817.88
  6. Step 6: Final answer
    x = 297,438.16

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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.