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Finding the Fourth Proportional to 373,225, 515,118 and 220,253.80

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Solution

The fourth proportional to 373,225, 515,118 and 220,253.80 is: 303,990.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,225 : 515,118 = 220,253.80 : x
  2. Step 2: Convert to fraction form
    373,225/515,118 = 220,253.80/x
  3. Step 3: Cross multiply
    373,225x = 515,118 × 220,253.80
  4. Step 4: Simplify right side
    373,225x = 113,456,696,948.40
  5. Step 5: Solve for x
    x = 113,456,696,948.40/373,225
  6. Step 6: Final answer
    x = 303,990.08

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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.