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Finding the Fourth Proportional to 396,654.95, 546,625.49 and 389,366.78

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Solution

The fourth proportional to 396,654.95, 546,625.49 and 389,366.78 is: 536,581.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,654.95 : 546,625.49 = 389,366.78 : x
  2. Step 2: Convert to fraction form
    396,654.95/546,625.49 = 389,366.78/x
  3. Step 3: Cross multiply
    396,654.95x = 546,625.49 × 389,366.78
  4. Step 4: Simplify right side
    396,654.95x = 212,837,804,960.39
  5. Step 5: Solve for x
    x = 212,837,804,960.39/396,654.95
  6. Step 6: Final answer
    x = 536,581.74

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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.