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Finding the Fourth Proportional to 664,491.78, 996,835.49 and 215,063.28

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Solution

The fourth proportional to 664,491.78, 996,835.49 and 215,063.28 is: 322,626.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,491.78 : 996,835.49 = 215,063.28 : x
  2. Step 2: Convert to fraction form
    664,491.78/996,835.49 = 215,063.28/x
  3. Step 3: Cross multiply
    664,491.78x = 996,835.49 × 215,063.28
  4. Step 4: Simplify right side
    664,491.78x = 214,382,710,099.81
  5. Step 5: Solve for x
    x = 214,382,710,099.81/664,491.78
  6. Step 6: Final answer
    x = 322,626.58

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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.