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Finding the Fourth Proportional to 384,987.60, 577,481.40 and 135,694.80

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Solution

The fourth proportional to 384,987.60, 577,481.40 and 135,694.80 is: 203,542.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,987.60 : 577,481.40 = 135,694.80 : x
  2. Step 2: Convert to fraction form
    384,987.60/577,481.40 = 135,694.80/x
  3. Step 3: Cross multiply
    384,987.60x = 577,481.40 × 135,694.80
  4. Step 4: Simplify right side
    384,987.60x = 78,361,223,076.72
  5. Step 5: Solve for x
    x = 78,361,223,076.72/384,987.60
  6. Step 6: Final answer
    x = 203,542.20

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1.5x scale

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.