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Finding the Fourth Proportional to 396,018.72, 594,018.27 and 115,538.40

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Solution

The fourth proportional to 396,018.72, 594,018.27 and 115,538.40 is: 173,304.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,018.72 : 594,018.27 = 115,538.40 : x
  2. Step 2: Convert to fraction form
    396,018.72/594,018.27 = 115,538.40/x
  3. Step 3: Cross multiply
    396,018.72x = 594,018.27 × 115,538.40
  4. Step 4: Simplify right side
    396,018.72x = 68,631,920,486.57
  5. Step 5: Solve for x
    x = 68,631,920,486.57/396,018.72
  6. Step 6: Final answer
    x = 173,304.74

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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.