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Finding the Fourth Proportional to 408,550.98, 612,924.89 and 128,068.23

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Solution

The fourth proportional to 408,550.98, 612,924.89 and 128,068.23 is: 192,133.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,550.98 : 612,924.89 = 128,068.23 : x
  2. Step 2: Convert to fraction form
    408,550.98/612,924.89 = 128,068.23/x
  3. Step 3: Cross multiply
    408,550.98x = 612,924.89 × 128,068.23
  4. Step 4: Simplify right side
    408,550.98x = 78,496,205,785.24
  5. Step 5: Solve for x
    x = 78,496,205,785.24/408,550.98
  6. Step 6: Final answer
    x = 192,133.20

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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.