Home / 1,517.24-2,275.80-421.52

Finding the Fourth Proportional to 1,517.24, 2,275.80 and 421.52

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Solution

The fourth proportional to 1,517.24, 2,275.80 and 421.52 is: 632.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.24 : 2,275.80 = 421.52 : x
  2. Step 2: Convert to fraction form
    1,517.24/2,275.80 = 421.52/x
  3. Step 3: Cross multiply
    1,517.24x = 2,275.80 × 421.52
  4. Step 4: Simplify right side
    1,517.24x = 959,295.22
  5. Step 5: Solve for x
    x = 959,295.22/1,517.24
  6. Step 6: Final answer
    x = 632.26

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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.