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Finding the Fourth Proportional to 515,331.55, 773,217.64 and 266,188.51

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Solution

The fourth proportional to 515,331.55, 773,217.64 and 266,188.51 is: 399,396.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,331.55 : 773,217.64 = 266,188.51 : x
  2. Step 2: Convert to fraction form
    515,331.55/773,217.64 = 266,188.51/x
  3. Step 3: Cross multiply
    515,331.55x = 773,217.64 × 266,188.51
  4. Step 4: Simplify right side
    515,331.55x = 205,821,647,631.23
  5. Step 5: Solve for x
    x = 205,821,647,631.23/515,331.55
  6. Step 6: Final answer
    x = 399,396.56

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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.