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Finding the Fourth Proportional to 415,843.60, 622,890.60 and 345,859.60

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Solution

The fourth proportional to 415,843.60, 622,890.60 and 345,859.60 is: 518,061.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,843.60 : 622,890.60 = 345,859.60 : x
  2. Step 2: Convert to fraction form
    415,843.60/622,890.60 = 345,859.60/x
  3. Step 3: Cross multiply
    415,843.60x = 622,890.60 × 345,859.60
  4. Step 4: Simplify right side
    415,843.60x = 215,432,693,759.76
  5. Step 5: Solve for x
    x = 215,432,693,759.76/415,843.60
  6. Step 6: Final answer
    x = 518,061.82

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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.