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Finding the Fourth Proportional to 808,472.70, 1,213,693.20 and 408,907.80

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Solution

The fourth proportional to 808,472.70, 1,213,693.20 and 408,907.80 is: 613,859.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,472.70 : 1,213,693.20 = 408,907.80 : x
  2. Step 2: Convert to fraction form
    808,472.70/1,213,693.20 = 408,907.80/x
  3. Step 3: Cross multiply
    808,472.70x = 1,213,693.20 × 408,907.80
  4. Step 4: Simplify right side
    808,472.70x = 496,288,616,286.96
  5. Step 5: Solve for x
    x = 496,288,616,286.96/808,472.70
  6. Step 6: Final answer
    x = 613,859.46

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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.