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Finding the Fourth Proportional to 303,408.06, 418,860.52 and 221,644.52

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Solution

The fourth proportional to 303,408.06, 418,860.52 and 221,644.52 is: 305,984.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,408.06 : 418,860.52 = 221,644.52 : x
  2. Step 2: Convert to fraction form
    303,408.06/418,860.52 = 221,644.52/x
  3. Step 3: Cross multiply
    303,408.06x = 418,860.52 × 221,644.52
  4. Step 4: Simplify right side
    303,408.06x = 92,838,137,824.66
  5. Step 5: Solve for x
    x = 92,838,137,824.66/303,408.06
  6. Step 6: Final answer
    x = 305,984.41

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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.