Home / 820,171.80-1,230,257.70-784,742.40

Finding the Fourth Proportional to 820,171.80, 1,230,257.70 and 784,742.40

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Solution

The fourth proportional to 820,171.80, 1,230,257.70 and 784,742.40 is: 1,177,113.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,171.80 : 1,230,257.70 = 784,742.40 : x
  2. Step 2: Convert to fraction form
    820,171.80/1,230,257.70 = 784,742.40/x
  3. Step 3: Cross multiply
    820,171.80x = 1,230,257.70 × 784,742.40
  4. Step 4: Simplify right side
    820,171.80x = 965,435,380,116.48
  5. Step 5: Solve for x
    x = 965,435,380,116.48/820,171.80
  6. Step 6: Final answer
    x = 1,177,113.60

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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.