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Finding the Fourth Proportional to 408,550.45, 612,924.09 and 128,067.70

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Solution

The fourth proportional to 408,550.45, 612,924.09 and 128,067.70 is: 192,132.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,550.45 : 612,924.09 = 128,067.70 : x
  2. Step 2: Convert to fraction form
    408,550.45/612,924.09 = 128,067.70/x
  3. Step 3: Cross multiply
    408,550.45x = 612,924.09 × 128,067.70
  4. Step 4: Simplify right side
    408,550.45x = 78,495,779,487.18
  5. Step 5: Solve for x
    x = 78,495,779,487.18/408,550.45
  6. Step 6: Final answer
    x = 192,132.40

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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.