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Finding the Fourth Proportional to 891,805.72, 1,338,146 and 418,529.56

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Solution

The fourth proportional to 891,805.72, 1,338,146 and 418,529.56 is: 627,999.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,805.72 : 1,338,146 = 418,529.56 : x
  2. Step 2: Convert to fraction form
    891,805.72/1,338,146 = 418,529.56/x
  3. Step 3: Cross multiply
    891,805.72x = 1,338,146 × 418,529.56
  4. Step 4: Simplify right side
    891,805.72x = 560,053,656,595.76
  5. Step 5: Solve for x
    x = 560,053,656,595.76/891,805.72
  6. Step 6: Final answer
    x = 627,999.62

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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.