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Finding the Fourth Proportional to 403,425.40, 605,138.10 and 122,906.20

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Solution

The fourth proportional to 403,425.40, 605,138.10 and 122,906.20 is: 184,359.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,425.40 : 605,138.10 = 122,906.20 : x
  2. Step 2: Convert to fraction form
    403,425.40/605,138.10 = 122,906.20/x
  3. Step 3: Cross multiply
    403,425.40x = 605,138.10 × 122,906.20
  4. Step 4: Simplify right side
    403,425.40x = 74,375,224,346.22
  5. Step 5: Solve for x
    x = 74,375,224,346.22/403,425.40
  6. Step 6: Final answer
    x = 184,359.30

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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.