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Finding the Fourth Proportional to 664,384.70, 996,722.85 and 215,029.10

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Solution

The fourth proportional to 664,384.70, 996,722.85 and 215,029.10 is: 322,590.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,384.70 : 996,722.85 = 215,029.10 : x
  2. Step 2: Convert to fraction form
    664,384.70/996,722.85 = 215,029.10/x
  3. Step 3: Cross multiply
    664,384.70x = 996,722.85 × 215,029.10
  4. Step 4: Simplify right side
    664,384.70x = 214,324,417,384.94
  5. Step 5: Solve for x
    x = 214,324,417,384.94/664,384.70
  6. Step 6: Final answer
    x = 322,590.84

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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.