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Finding the Fourth Proportional to 515,396.72, 768,910.23 and 487,496.07

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Solution

The fourth proportional to 515,396.72, 768,910.23 and 487,496.07 is: 727,285.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,396.72 : 768,910.23 = 487,496.07 : x
  2. Step 2: Convert to fraction form
    515,396.72/768,910.23 = 487,496.07/x
  3. Step 3: Cross multiply
    515,396.72x = 768,910.23 × 487,496.07
  4. Step 4: Simplify right side
    515,396.72x = 374,840,711,463.25
  5. Step 5: Solve for x
    x = 374,840,711,463.25/515,396.72
  6. Step 6: Final answer
    x = 727,285.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.