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Finding the Fourth Proportional to 404,505.60, 606,758.40 and 123,986.40

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Solution

The fourth proportional to 404,505.60, 606,758.40 and 123,986.40 is: 185,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,505.60 : 606,758.40 = 123,986.40 : x
  2. Step 2: Convert to fraction form
    404,505.60/606,758.40 = 123,986.40/x
  3. Step 3: Cross multiply
    404,505.60x = 606,758.40 × 123,986.40
  4. Step 4: Simplify right side
    404,505.60x = 75,229,789,685.76
  5. Step 5: Solve for x
    x = 75,229,789,685.76/404,505.60
  6. Step 6: Final answer
    x = 185,979.60

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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.