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Finding the Fourth Proportional to 396,483.95, 547,148.45 and 215,195.94

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Solution

The fourth proportional to 396,483.95, 547,148.45 and 215,195.94 is: 296,970.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,483.95 : 547,148.45 = 215,195.94 : x
  2. Step 2: Convert to fraction form
    396,483.95/547,148.45 = 215,195.94/x
  3. Step 3: Cross multiply
    396,483.95x = 547,148.45 × 215,195.94
  4. Step 4: Simplify right side
    396,483.95x = 117,744,123,941.31
  5. Step 5: Solve for x
    x = 117,744,123,941.31/396,483.95
  6. Step 6: Final answer
    x = 296,970.72

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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.