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Finding the Fourth Proportional to 1,320,903, 1,822,868.82 and 717,291

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Solution

The fourth proportional to 1,320,903, 1,822,868.82 and 717,291 is: 989,873.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,903 : 1,822,868.82 = 717,291 : x
  2. Step 2: Convert to fraction form
    1,320,903/1,822,868.82 = 717,291/x
  3. Step 3: Cross multiply
    1,320,903x = 1,822,868.82 × 717,291
  4. Step 4: Simplify right side
    1,320,903x = 1,307,527,398,766.62
  5. Step 5: Solve for x
    x = 1,307,527,398,766.62/1,320,903
  6. Step 6: Final answer
    x = 989,873.90

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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.