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Finding the Fourth Proportional to 403,385.20, 605,164.20 and 122,930.80

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Solution

The fourth proportional to 403,385.20, 605,164.20 and 122,930.80 is: 184,422.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,385.20 : 605,164.20 = 122,930.80 : x
  2. Step 2: Convert to fraction form
    403,385.20/605,164.20 = 122,930.80/x
  3. Step 3: Cross multiply
    403,385.20x = 605,164.20 × 122,930.80
  4. Step 4: Simplify right side
    403,385.20x = 74,393,319,237.36
  5. Step 5: Solve for x
    x = 74,393,319,237.36/403,385.20
  6. Step 6: Final answer
    x = 184,422.53

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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.