Home / 1,121.57-1,549.31-1,021.82

Finding the Fourth Proportional to 1,121.57, 1,549.31 and 1,021.82

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Solution

The fourth proportional to 1,121.57, 1,549.31 and 1,021.82 is: 1,411.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.57 : 1,549.31 = 1,021.82 : x
  2. Step 2: Convert to fraction form
    1,121.57/1,549.31 = 1,021.82/x
  3. Step 3: Cross multiply
    1,121.57x = 1,549.31 × 1,021.82
  4. Step 4: Simplify right side
    1,121.57x = 1,583,115.94
  5. Step 5: Solve for x
    x = 1,583,115.94/1,121.57
  6. Step 6: Final answer
    x = 1,411.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.