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Finding the Fourth Proportional to 373,222, 515,113.86 and 220,250.80

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Solution

The fourth proportional to 373,222, 515,113.86 and 220,250.80 is: 303,985.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,222 : 515,113.86 = 220,250.80 : x
  2. Step 2: Convert to fraction form
    373,222/515,113.86 = 220,250.80/x
  3. Step 3: Cross multiply
    373,222x = 515,113.86 × 220,250.80
  4. Step 4: Simplify right side
    373,222x = 113,454,239,756.09
  5. Step 5: Solve for x
    x = 113,454,239,756.09/373,222
  6. Step 6: Final answer
    x = 303,985.94

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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.