Home / 820,207.20-1,228,928.40-398,575.20

Finding the Fourth Proportional to 820,207.20, 1,228,928.40 and 398,575.20

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Solution

The fourth proportional to 820,207.20, 1,228,928.40 and 398,575.20 is: 597,191.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,207.20 : 1,228,928.40 = 398,575.20 : x
  2. Step 2: Convert to fraction form
    820,207.20/1,228,928.40 = 398,575.20/x
  3. Step 3: Cross multiply
    820,207.20x = 1,228,928.40 × 398,575.20
  4. Step 4: Simplify right side
    820,207.20x = 489,820,382,815.68
  5. Step 5: Solve for x
    x = 489,820,382,815.68/820,207.20
  6. Step 6: Final answer
    x = 597,191.03

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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.