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Finding the Fourth Proportional to 396,988.65, 547,846.56 and 215,702.01

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Solution

The fourth proportional to 396,988.65, 547,846.56 and 215,702.01 is: 297,669.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,988.65 : 547,846.56 = 215,702.01 : x
  2. Step 2: Convert to fraction form
    396,988.65/547,846.56 = 215,702.01/x
  3. Step 3: Cross multiply
    396,988.65x = 547,846.56 × 215,702.01
  4. Step 4: Simplify right side
    396,988.65x = 118,171,604,163.59
  5. Step 5: Solve for x
    x = 118,171,604,163.59/396,988.65
  6. Step 6: Final answer
    x = 297,669.98

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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.