Home / 1,245.01-1,867.61-422.95

Finding the Fourth Proportional to 1,245.01, 1,867.61 and 422.95

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Solution

The fourth proportional to 1,245.01, 1,867.61 and 422.95 is: 634.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.01 : 1,867.61 = 422.95 : x
  2. Step 2: Convert to fraction form
    1,245.01/1,867.61 = 422.95/x
  3. Step 3: Cross multiply
    1,245.01x = 1,867.61 × 422.95
  4. Step 4: Simplify right side
    1,245.01x = 789,905.65
  5. Step 5: Solve for x
    x = 789,905.65/1,245.01
  6. Step 6: Final answer
    x = 634.46

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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.