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Finding the Fourth Proportional to 403,791.80, 605,687.70 and 123,308.60

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Solution

The fourth proportional to 403,791.80, 605,687.70 and 123,308.60 is: 184,962.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,791.80 : 605,687.70 = 123,308.60 : x
  2. Step 2: Convert to fraction form
    403,791.80/605,687.70 = 123,308.60/x
  3. Step 3: Cross multiply
    403,791.80x = 605,687.70 × 123,308.60
  4. Step 4: Simplify right side
    403,791.80x = 74,686,502,324.22
  5. Step 5: Solve for x
    x = 74,686,502,324.22/403,791.80
  6. Step 6: Final answer
    x = 184,962.90

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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.