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Finding the Fourth Proportional to 515,333.55, 773,220.64 and 266,190.51

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Solution

The fourth proportional to 515,333.55, 773,220.64 and 266,190.51 is: 399,399.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,333.55 : 773,220.64 = 266,190.51 : x
  2. Step 2: Convert to fraction form
    515,333.55/773,220.64 = 266,190.51/x
  3. Step 3: Cross multiply
    515,333.55x = 773,220.64 × 266,190.51
  4. Step 4: Simplify right side
    515,333.55x = 205,823,996,504.13
  5. Step 5: Solve for x
    x = 205,823,996,504.13/515,333.55
  6. Step 6: Final answer
    x = 399,399.57

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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.