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Finding the Fourth Proportional to 1,321,769.48, 1,823,904.45 and 777,872.90

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Solution

The fourth proportional to 1,321,769.48, 1,823,904.45 and 777,872.90 is: 1,073,383.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,769.48 : 1,823,904.45 = 777,872.90 : x
  2. Step 2: Convert to fraction form
    1,321,769.48/1,823,904.45 = 777,872.90/x
  3. Step 3: Cross multiply
    1,321,769.48x = 1,823,904.45 × 777,872.90
  4. Step 4: Simplify right side
    1,321,769.48x = 1,418,765,848,404.17
  5. Step 5: Solve for x
    x = 1,418,765,848,404.17/1,321,769.48
  6. Step 6: Final answer
    x = 1,073,383.73

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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.