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Finding the Fourth Proportional to 728,068.80, 1,091,908.80 and 254,704.80

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Solution

The fourth proportional to 728,068.80, 1,091,908.80 and 254,704.80 is: 381,989.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,068.80 : 1,091,908.80 = 254,704.80 : x
  2. Step 2: Convert to fraction form
    728,068.80/1,091,908.80 = 254,704.80/x
  3. Step 3: Cross multiply
    728,068.80x = 1,091,908.80 × 254,704.80
  4. Step 4: Simplify right side
    728,068.80x = 278,114,412,522.24
  5. Step 5: Solve for x
    x = 278,114,412,522.24/728,068.80
  6. Step 6: Final answer
    x = 381,989.19

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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.