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Finding the Fourth Proportional to 1,215,794.80, 1,705,845.20 and 1,215,794.80

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Solution

The fourth proportional to 1,215,794.80, 1,705,845.20 and 1,215,794.80 is: 1,705,845.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,794.80 : 1,705,845.20 = 1,215,794.80 : x
  2. Step 2: Convert to fraction form
    1,215,794.80/1,705,845.20 = 1,215,794.80/x
  3. Step 3: Cross multiply
    1,215,794.80x = 1,705,845.20 × 1,215,794.80
  4. Step 4: Simplify right side
    1,215,794.80x = 2,073,957,723,764.96
  5. Step 5: Solve for x
    x = 2,073,957,723,764.96/1,215,794.80
  6. Step 6: Final answer
    x = 1,705,845.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.