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Finding the Fourth Proportional to 396,509.02, 547,173.76 and 215,221.30

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Solution

The fourth proportional to 396,509.02, 547,173.76 and 215,221.30 is: 297,000.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,509.02 : 547,173.76 = 215,221.30 : x
  2. Step 2: Convert to fraction form
    396,509.02/547,173.76 = 215,221.30/x
  3. Step 3: Cross multiply
    396,509.02x = 547,173.76 × 215,221.30
  4. Step 4: Simplify right side
    396,509.02x = 117,763,447,953.09
  5. Step 5: Solve for x
    x = 117,763,447,953.09/396,509.02
  6. Step 6: Final answer
    x = 297,000.68

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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.