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Finding the Fourth Proportional to 368,906.80, 552,922.80 and 331,290.40

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Solution

The fourth proportional to 368,906.80, 552,922.80 and 331,290.40 is: 496,542.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,906.80 : 552,922.80 = 331,290.40 : x
  2. Step 2: Convert to fraction form
    368,906.80/552,922.80 = 331,290.40/x
  3. Step 3: Cross multiply
    368,906.80x = 552,922.80 × 331,290.40
  4. Step 4: Simplify right side
    368,906.80x = 183,178,015,581.12
  5. Step 5: Solve for x
    x = 183,178,015,581.12/368,906.80
  6. Step 6: Final answer
    x = 496,542.80

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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.