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Finding the Fourth Proportional to 396,276.49, 546,913.15 and 221,913.11

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Solution

The fourth proportional to 396,276.49, 546,913.15 and 221,913.11 is: 306,268.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,276.49 : 546,913.15 = 221,913.11 : x
  2. Step 2: Convert to fraction form
    396,276.49/546,913.15 = 221,913.11/x
  3. Step 3: Cross multiply
    396,276.49x = 546,913.15 × 221,913.11
  4. Step 4: Simplify right side
    396,276.49x = 121,367,198,016.40
  5. Step 5: Solve for x
    x = 121,367,198,016.40/396,276.49
  6. Step 6: Final answer
    x = 306,268.98

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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.