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Finding the Fourth Proportional to 403,768.80, 605,653.20 and 123,285.60

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Solution

The fourth proportional to 403,768.80, 605,653.20 and 123,285.60 is: 184,928.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,768.80 : 605,653.20 = 123,285.60 : x
  2. Step 2: Convert to fraction form
    403,768.80/605,653.20 = 123,285.60/x
  3. Step 3: Cross multiply
    403,768.80x = 605,653.20 × 123,285.60
  4. Step 4: Simplify right side
    403,768.80x = 74,668,318,153.92
  5. Step 5: Solve for x
    x = 74,668,318,153.92/403,768.80
  6. Step 6: Final answer
    x = 184,928.40

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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.