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Finding the Fourth Proportional to 721,310.40, 1,082,354.40 and 300,628.80

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Solution

The fourth proportional to 721,310.40, 1,082,354.40 and 300,628.80 is: 451,105.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,310.40 : 1,082,354.40 = 300,628.80 : x
  2. Step 2: Convert to fraction form
    721,310.40/1,082,354.40 = 300,628.80/x
  3. Step 3: Cross multiply
    721,310.40x = 1,082,354.40 × 300,628.80
  4. Step 4: Simplify right side
    721,310.40x = 325,386,904,446.72
  5. Step 5: Solve for x
    x = 325,386,904,446.72/721,310.40
  6. Step 6: Final answer
    x = 451,105.24

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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.