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Finding the Fourth Proportional to 661,088.25, 991,912.97 and 361,218.52

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Solution

The fourth proportional to 661,088.25, 991,912.97 and 361,218.52 is: 541,981.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,088.25 : 991,912.97 = 361,218.52 : x
  2. Step 2: Convert to fraction form
    661,088.25/991,912.97 = 361,218.52/x
  3. Step 3: Cross multiply
    661,088.25x = 991,912.97 × 361,218.52
  4. Step 4: Simplify right side
    661,088.25x = 358,297,337,135.14
  5. Step 5: Solve for x
    x = 358,297,337,135.14/661,088.25
  6. Step 6: Final answer
    x = 541,981.10

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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.