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Finding the Fourth Proportional to 396,499.44, 546,415.02 and 389,212.68

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Solution

The fourth proportional to 396,499.44, 546,415.02 and 389,212.68 is: 536,373.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,499.44 : 546,415.02 = 389,212.68 : x
  2. Step 2: Convert to fraction form
    396,499.44/546,415.02 = 389,212.68/x
  3. Step 3: Cross multiply
    396,499.44x = 546,415.02 × 389,212.68
  4. Step 4: Simplify right side
    396,499.44x = 212,671,654,326.45
  5. Step 5: Solve for x
    x = 212,671,654,326.45/396,499.44
  6. Step 6: Final answer
    x = 536,373.15

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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.