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Finding the Fourth Proportional to 403,879.40, 605,847.90 and 123,396.20

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Solution

The fourth proportional to 403,879.40, 605,847.90 and 123,396.20 is: 185,103.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,879.40 : 605,847.90 = 123,396.20 : x
  2. Step 2: Convert to fraction form
    403,879.40/605,847.90 = 123,396.20/x
  3. Step 3: Cross multiply
    403,879.40x = 605,847.90 × 123,396.20
  4. Step 4: Simplify right side
    403,879.40x = 74,759,328,637.98
  5. Step 5: Solve for x
    x = 74,759,328,637.98/403,879.40
  6. Step 6: Final answer
    x = 185,103.10

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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.