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Finding the Fourth Proportional to 661,615.48, 991,974.12 and 336,604.80

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Solution

The fourth proportional to 661,615.48, 991,974.12 and 336,604.80 is: 504,678.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,615.48 : 991,974.12 = 336,604.80 : x
  2. Step 2: Convert to fraction form
    661,615.48/991,974.12 = 336,604.80/x
  3. Step 3: Cross multiply
    661,615.48x = 991,974.12 × 336,604.80
  4. Step 4: Simplify right side
    661,615.48x = 333,903,250,267.78
  5. Step 5: Solve for x
    x = 333,903,250,267.78/661,615.48
  6. Step 6: Final answer
    x = 504,678.71

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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.