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Finding the Fourth Proportional to 869,499.80, 1,304,249.70 and 711,906.20

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Solution

The fourth proportional to 869,499.80, 1,304,249.70 and 711,906.20 is: 1,067,859.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,499.80 : 1,304,249.70 = 711,906.20 : x
  2. Step 2: Convert to fraction form
    869,499.80/1,304,249.70 = 711,906.20/x
  3. Step 3: Cross multiply
    869,499.80x = 1,304,249.70 × 711,906.20
  4. Step 4: Simplify right side
    869,499.80x = 928,503,447,778.14
  5. Step 5: Solve for x
    x = 928,503,447,778.14/869,499.80
  6. Step 6: Final answer
    x = 1,067,859.30

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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.