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Finding the Fourth Proportional to 811,647.82, 1,120,107 and 449,065.81

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Solution

The fourth proportional to 811,647.82, 1,120,107 and 449,065.81 is: 619,729.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,647.82 : 1,120,107 = 449,065.81 : x
  2. Step 2: Convert to fraction form
    811,647.82/1,120,107 = 449,065.81/x
  3. Step 3: Cross multiply
    811,647.82x = 1,120,107 × 449,065.81
  4. Step 4: Simplify right side
    811,647.82x = 503,001,757,241.67
  5. Step 5: Solve for x
    x = 503,001,757,241.67/811,647.82
  6. Step 6: Final answer
    x = 619,729.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.