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Finding the Fourth Proportional to 386,843.60, 580,265.40 and 254,133.20

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Solution

The fourth proportional to 386,843.60, 580,265.40 and 254,133.20 is: 381,199.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,843.60 : 580,265.40 = 254,133.20 : x
  2. Step 2: Convert to fraction form
    386,843.60/580,265.40 = 254,133.20/x
  3. Step 3: Cross multiply
    386,843.60x = 580,265.40 × 254,133.20
  4. Step 4: Simplify right side
    386,843.60x = 147,464,702,951.28
  5. Step 5: Solve for x
    x = 147,464,702,951.28/386,843.60
  6. Step 6: Final answer
    x = 381,199.80

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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.