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Finding the Fourth Proportional to 499,819.78, 689,033.90 and 356,330.71

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Solution

The fourth proportional to 499,819.78, 689,033.90 and 356,330.71 is: 491,224.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,819.78 : 689,033.90 = 356,330.71 : x
  2. Step 2: Convert to fraction form
    499,819.78/689,033.90 = 356,330.71/x
  3. Step 3: Cross multiply
    499,819.78x = 689,033.90 × 356,330.71
  4. Step 4: Simplify right side
    499,819.78x = 245,523,940,553.19
  5. Step 5: Solve for x
    x = 245,523,940,553.19/499,819.78
  6. Step 6: Final answer
    x = 491,224.94

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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.