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Finding the Fourth Proportional to 664,503.10, 996,900.45 and 215,244.70

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Solution

The fourth proportional to 664,503.10, 996,900.45 and 215,244.70 is: 322,914.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,503.10 : 996,900.45 = 215,244.70 : x
  2. Step 2: Convert to fraction form
    664,503.10/996,900.45 = 215,244.70/x
  3. Step 3: Cross multiply
    664,503.10x = 996,900.45 × 215,244.70
  4. Step 4: Simplify right side
    664,503.10x = 214,577,538,290.12
  5. Step 5: Solve for x
    x = 214,577,538,290.12/664,503.10
  6. Step 6: Final answer
    x = 322,914.28

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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.