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Finding the Fourth Proportional to 661,100.33, 991,930.66 and 361,230.57

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Solution

The fourth proportional to 661,100.33, 991,930.66 and 361,230.57 is: 541,998.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,100.33 : 991,930.66 = 361,230.57 : x
  2. Step 2: Convert to fraction form
    661,100.33/991,930.66 = 361,230.57/x
  3. Step 3: Cross multiply
    661,100.33x = 991,930.66 × 361,230.57
  4. Step 4: Simplify right side
    661,100.33x = 358,315,676,809.20
  5. Step 5: Solve for x
    x = 358,315,676,809.20/661,100.33
  6. Step 6: Final answer
    x = 541,998.94

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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.