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Finding the Fourth Proportional to 664,488.30, 996,830.26 and 215,059.80

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Solution

The fourth proportional to 664,488.30, 996,830.26 and 215,059.80 is: 322,621.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,488.30 : 996,830.26 = 215,059.80 : x
  2. Step 2: Convert to fraction form
    664,488.30/996,830.26 = 215,059.80/x
  3. Step 3: Cross multiply
    664,488.30x = 996,830.26 × 215,059.80
  4. Step 4: Simplify right side
    664,488.30x = 214,378,116,349.55
  5. Step 5: Solve for x
    x = 214,378,116,349.55/664,488.30
  6. Step 6: Final answer
    x = 322,621.36

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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.