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Finding the Fourth Proportional to 1,321,939.98, 1,982,297.61 and 1,068,597.90

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Solution

The fourth proportional to 1,321,939.98, 1,982,297.61 and 1,068,597.90 is: 1,602,401.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,939.98 : 1,982,297.61 = 1,068,597.90 : x
  2. Step 2: Convert to fraction form
    1,321,939.98/1,982,297.61 = 1,068,597.90/x
  3. Step 3: Cross multiply
    1,321,939.98x = 1,982,297.61 × 1,068,597.90
  4. Step 4: Simplify right side
    1,321,939.98x = 2,118,279,063,221.02
  5. Step 5: Solve for x
    x = 2,118,279,063,221.02/1,321,939.98
  6. Step 6: Final answer
    x = 1,602,401.85

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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.