Home / 1,422.11-2,133.50-485.01

Finding the Fourth Proportional to 1,422.11, 2,133.50 and 485.01

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Solution

The fourth proportional to 1,422.11, 2,133.50 and 485.01 is: 727.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.11 : 2,133.50 = 485.01 : x
  2. Step 2: Convert to fraction form
    1,422.11/2,133.50 = 485.01/x
  3. Step 3: Cross multiply
    1,422.11x = 2,133.50 × 485.01
  4. Step 4: Simplify right side
    1,422.11x = 1,034,766.41
  5. Step 5: Solve for x
    x = 1,034,766.41/1,422.11
  6. Step 6: Final answer
    x = 727.63

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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.