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Finding the Fourth Proportional to 403,912.60, 605,868.90 and 123,427.44

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Solution

The fourth proportional to 403,912.60, 605,868.90 and 123,427.44 is: 185,141.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,912.60 : 605,868.90 = 123,427.44 : x
  2. Step 2: Convert to fraction form
    403,912.60/605,868.90 = 123,427.44/x
  3. Step 3: Cross multiply
    403,912.60x = 605,868.90 × 123,427.44
  4. Step 4: Simplify right side
    403,912.60x = 74,780,847,302.62
  5. Step 5: Solve for x
    x = 74,780,847,302.62/403,912.60
  6. Step 6: Final answer
    x = 185,141.16

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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.