Home / 820,171.80-1,230,257.70-442,258.20

Finding the Fourth Proportional to 820,171.80, 1,230,257.70 and 442,258.20

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Solution

The fourth proportional to 820,171.80, 1,230,257.70 and 442,258.20 is: 663,387.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,171.80 : 1,230,257.70 = 442,258.20 : x
  2. Step 2: Convert to fraction form
    820,171.80/1,230,257.70 = 442,258.20/x
  3. Step 3: Cross multiply
    820,171.80x = 1,230,257.70 × 442,258.20
  4. Step 4: Simplify right side
    820,171.80x = 544,091,555,938.14
  5. Step 5: Solve for x
    x = 544,091,555,938.14/820,171.80
  6. Step 6: Final answer
    x = 663,387.30

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Similar ratio
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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.