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Finding the Fourth Proportional to 408,550.80, 612,924.61 and 128,068.05

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Solution

The fourth proportional to 408,550.80, 612,924.61 and 128,068.05 is: 192,132.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,550.80 : 612,924.61 = 128,068.05 : x
  2. Step 2: Convert to fraction form
    408,550.80/612,924.61 = 128,068.05/x
  3. Step 3: Cross multiply
    408,550.80x = 612,924.61 × 128,068.05
  4. Step 4: Simplify right side
    408,550.80x = 78,496,059,599.71
  5. Step 5: Solve for x
    x = 78,496,059,599.71/408,550.80
  6. Step 6: Final answer
    x = 192,132.92

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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.