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Finding the Fourth Proportional to 403,429.60, 605,144.40 and 122,960.80

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Solution

The fourth proportional to 403,429.60, 605,144.40 and 122,960.80 is: 184,441.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,429.60 : 605,144.40 = 122,960.80 : x
  2. Step 2: Convert to fraction form
    403,429.60/605,144.40 = 122,960.80/x
  3. Step 3: Cross multiply
    403,429.60x = 605,144.40 × 122,960.80
  4. Step 4: Simplify right side
    403,429.60x = 74,409,039,539.52
  5. Step 5: Solve for x
    x = 74,409,039,539.52/403,429.60
  6. Step 6: Final answer
    x = 184,441.20

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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.