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Finding the Fourth Proportional to 1,190,788.74, 1,786,241.49 and 480,728.22

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Solution

The fourth proportional to 1,190,788.74, 1,786,241.49 and 480,728.22 is: 721,115.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190,788.74 : 1,786,241.49 = 480,728.22 : x
  2. Step 2: Convert to fraction form
    1,190,788.74/1,786,241.49 = 480,728.22/x
  3. Step 3: Cross multiply
    1,190,788.74x = 1,786,241.49 × 480,728.22
  4. Step 4: Simplify right side
    1,190,788.74x = 858,696,691,977.85
  5. Step 5: Solve for x
    x = 858,696,691,977.85/1,190,788.74
  6. Step 6: Final answer
    x = 721,115.90

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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.