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Finding the Fourth Proportional to 891,918, 1,230,847.64 and 484,019.85

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Solution

The fourth proportional to 891,918, 1,230,847.64 and 484,019.85 is: 667,947.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,918 : 1,230,847.64 = 484,019.85 : x
  2. Step 2: Convert to fraction form
    891,918/1,230,847.64 = 484,019.85/x
  3. Step 3: Cross multiply
    891,918x = 1,230,847.64 × 484,019.85
  4. Step 4: Simplify right side
    891,918x = 595,754,687,665.56
  5. Step 5: Solve for x
    x = 595,754,687,665.56/891,918
  6. Step 6: Final answer
    x = 667,947.82

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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.