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Finding the Fourth Proportional to 402,620.20, 604,003.20 and 202,436.80

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Solution

The fourth proportional to 402,620.20, 604,003.20 and 202,436.80 is: 303,691.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,620.20 : 604,003.20 = 202,436.80 : x
  2. Step 2: Convert to fraction form
    402,620.20/604,003.20 = 202,436.80/x
  3. Step 3: Cross multiply
    402,620.20x = 604,003.20 × 202,436.80
  4. Step 4: Simplify right side
    402,620.20x = 122,272,474,997.76
  5. Step 5: Solve for x
    x = 122,272,474,997.76/402,620.20
  6. Step 6: Final answer
    x = 303,691.85

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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.