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Finding the Fourth Proportional to 403,857.20, 605,780.40 and 123,375.80

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Solution

The fourth proportional to 403,857.20, 605,780.40 and 123,375.80 is: 185,062.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,857.20 : 605,780.40 = 123,375.80 : x
  2. Step 2: Convert to fraction form
    403,857.20/605,780.40 = 123,375.80/x
  3. Step 3: Cross multiply
    403,857.20x = 605,780.40 × 123,375.80
  4. Step 4: Simplify right side
    403,857.20x = 74,738,641,474.32
  5. Step 5: Solve for x
    x = 74,738,641,474.32/403,857.20
  6. Step 6: Final answer
    x = 185,062.05

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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.