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Finding the Fourth Proportional to 519,991.96, 717,593.64 and 305,135.60

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Solution

The fourth proportional to 519,991.96, 717,593.64 and 305,135.60 is: 421,089.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,991.96 : 717,593.64 = 305,135.60 : x
  2. Step 2: Convert to fraction form
    519,991.96/717,593.64 = 305,135.60/x
  3. Step 3: Cross multiply
    519,991.96x = 717,593.64 × 305,135.60
  4. Step 4: Simplify right side
    519,991.96x = 218,963,365,897.58
  5. Step 5: Solve for x
    x = 218,963,365,897.58/519,991.96
  6. Step 6: Final answer
    x = 421,089.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.