Home / 813,428.70-1,219,330.98-280,609.86

Finding the Fourth Proportional to 813,428.70, 1,219,330.98 and 280,609.86

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Solution

The fourth proportional to 813,428.70, 1,219,330.98 and 280,609.86 is: 420,634.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,428.70 : 1,219,330.98 = 280,609.86 : x
  2. Step 2: Convert to fraction form
    813,428.70/1,219,330.98 = 280,609.86/x
  3. Step 3: Cross multiply
    813,428.70x = 1,219,330.98 × 280,609.86
  4. Step 4: Simplify right side
    813,428.70x = 342,156,295,591.46
  5. Step 5: Solve for x
    x = 342,156,295,591.46/813,428.70
  6. Step 6: Final answer
    x = 420,634.65

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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.