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Finding the Fourth Proportional to 520,796.79, 780,579.99 and 200,751.21

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Solution

The fourth proportional to 520,796.79, 780,579.99 and 200,751.21 is: 300,889.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,796.79 : 780,579.99 = 200,751.21 : x
  2. Step 2: Convert to fraction form
    520,796.79/780,579.99 = 200,751.21/x
  3. Step 3: Cross multiply
    520,796.79x = 780,579.99 × 200,751.21
  4. Step 4: Simplify right side
    520,796.79x = 156,702,377,494.29
  5. Step 5: Solve for x
    x = 156,702,377,494.29/520,796.79
  6. Step 6: Final answer
    x = 300,889.68

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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.