Home / 812,711.84-1,219,262.40-339,133.76

Finding the Fourth Proportional to 812,711.84, 1,219,262.40 and 339,133.76

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Solution

The fourth proportional to 812,711.84, 1,219,262.40 and 339,133.76 is: 508,781.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,711.84 : 1,219,262.40 = 339,133.76 : x
  2. Step 2: Convert to fraction form
    812,711.84/1,219,262.40 = 339,133.76/x
  3. Step 3: Cross multiply
    812,711.84x = 1,219,262.40 × 339,133.76
  4. Step 4: Simplify right side
    812,711.84x = 413,493,042,138.62
  5. Step 5: Solve for x
    x = 413,493,042,138.62/812,711.84
  6. Step 6: Final answer
    x = 508,781.86

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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.