Home / 1,517.22-2,275.73-421.59

Finding the Fourth Proportional to 1,517.22, 2,275.73 and 421.59

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Solution

The fourth proportional to 1,517.22, 2,275.73 and 421.59 is: 632.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.22 : 2,275.73 = 421.59 : x
  2. Step 2: Convert to fraction form
    1,517.22/2,275.73 = 421.59/x
  3. Step 3: Cross multiply
    1,517.22x = 2,275.73 × 421.59
  4. Step 4: Simplify right side
    1,517.22x = 959,425.01
  5. Step 5: Solve for x
    x = 959,425.01/1,517.22
  6. Step 6: Final answer
    x = 632.36

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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.