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Finding the Fourth Proportional to 403,489.20, 605,320.20 and 123,034.80

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Solution

The fourth proportional to 403,489.20, 605,320.20 and 123,034.80 is: 184,578.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,489.20 : 605,320.20 = 123,034.80 : x
  2. Step 2: Convert to fraction form
    403,489.20/605,320.20 = 123,034.80/x
  3. Step 3: Cross multiply
    403,489.20x = 605,320.20 × 123,034.80
  4. Step 4: Simplify right side
    403,489.20x = 74,475,449,742.96
  5. Step 5: Solve for x
    x = 74,475,449,742.96/403,489.20
  6. Step 6: Final answer
    x = 184,578.55

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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.