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Finding the Fourth Proportional to 330,305.80, 495,458.70 and 80,987.80

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Solution

The fourth proportional to 330,305.80, 495,458.70 and 80,987.80 is: 121,481.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,305.80 : 495,458.70 = 80,987.80 : x
  2. Step 2: Convert to fraction form
    330,305.80/495,458.70 = 80,987.80/x
  3. Step 3: Cross multiply
    330,305.80x = 495,458.70 × 80,987.80
  4. Step 4: Simplify right side
    330,305.80x = 40,126,110,103.86
  5. Step 5: Solve for x
    x = 40,126,110,103.86/330,305.80
  6. Step 6: Final answer
    x = 121,481.70

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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.