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Finding the Fourth Proportional to 1,984,687.35, 2,976,229.64 and 769,624.21

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Solution

The fourth proportional to 1,984,687.35, 2,976,229.64 and 769,624.21 is: 1,154,125.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,984,687.35 : 2,976,229.64 = 769,624.21 : x
  2. Step 2: Convert to fraction form
    1,984,687.35/2,976,229.64 = 769,624.21/x
  3. Step 3: Cross multiply
    1,984,687.35x = 2,976,229.64 × 769,624.21
  4. Step 4: Simplify right side
    1,984,687.35x = 2,290,578,379,490.47
  5. Step 5: Solve for x
    x = 2,290,578,379,490.47/1,984,687.35
  6. Step 6: Final answer
    x = 1,154,125.55

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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.