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Finding the Fourth Proportional to 408,082.60, 612,123.90 and 219,125.80

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Solution

The fourth proportional to 408,082.60, 612,123.90 and 219,125.80 is: 328,688.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,082.60 : 612,123.90 = 219,125.80 : x
  2. Step 2: Convert to fraction form
    408,082.60/612,123.90 = 219,125.80/x
  3. Step 3: Cross multiply
    408,082.60x = 612,123.90 × 219,125.80
  4. Step 4: Simplify right side
    408,082.60x = 134,132,139,286.62
  5. Step 5: Solve for x
    x = 134,132,139,286.62/408,082.60
  6. Step 6: Final answer
    x = 328,688.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.