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Finding the Fourth Proportional to 664,405.34, 996,766.76 and 215,126.69

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Solution

The fourth proportional to 664,405.34, 996,766.76 and 215,126.69 is: 322,741.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,405.34 : 996,766.76 = 215,126.69 : x
  2. Step 2: Convert to fraction form
    664,405.34/996,766.76 = 215,126.69/x
  3. Step 3: Cross multiply
    664,405.34x = 996,766.76 × 215,126.69
  4. Step 4: Simplify right side
    664,405.34x = 214,431,129,334.81
  5. Step 5: Solve for x
    x = 214,431,129,334.81/664,405.34
  6. Step 6: Final answer
    x = 322,741.43

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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.