Home / 1,517.22-2,275.83-421.56

Finding the Fourth Proportional to 1,517.22, 2,275.83 and 421.56

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Solution

The fourth proportional to 1,517.22, 2,275.83 and 421.56 is: 632.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.22 : 2,275.83 = 421.56 : x
  2. Step 2: Convert to fraction form
    1,517.22/2,275.83 = 421.56/x
  3. Step 3: Cross multiply
    1,517.22x = 2,275.83 × 421.56
  4. Step 4: Simplify right side
    1,517.22x = 959,398.89
  5. Step 5: Solve for x
    x = 959,398.89/1,517.22
  6. Step 6: Final answer
    x = 632.34

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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.