Home / 1,518.25-2,276.90-422.69

Finding the Fourth Proportional to 1,518.25, 2,276.90 and 422.69

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Solution

The fourth proportional to 1,518.25, 2,276.90 and 422.69 is: 633.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518.25 : 2,276.90 = 422.69 : x
  2. Step 2: Convert to fraction form
    1,518.25/2,276.90 = 422.69/x
  3. Step 3: Cross multiply
    1,518.25x = 2,276.90 × 422.69
  4. Step 4: Simplify right side
    1,518.25x = 962,422.86
  5. Step 5: Solve for x
    x = 962,422.86/1,518.25
  6. Step 6: Final answer
    x = 633.90

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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.