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Finding the Fourth Proportional to 519,991.20, 780,100.20 and 295,459.20

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Solution

The fourth proportional to 519,991.20, 780,100.20 and 295,459.20 is: 443,253.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,991.20 : 780,100.20 = 295,459.20 : x
  2. Step 2: Convert to fraction form
    519,991.20/780,100.20 = 295,459.20/x
  3. Step 3: Cross multiply
    519,991.20x = 780,100.20 × 295,459.20
  4. Step 4: Simplify right side
    519,991.20x = 230,487,781,011.84
  5. Step 5: Solve for x
    x = 230,487,781,011.84/519,991.20
  6. Step 6: Final answer
    x = 443,253.23

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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.