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Finding the Fourth Proportional to 1,121.54, 1,682.37 and 341.60

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Solution

The fourth proportional to 1,121.54, 1,682.37 and 341.60 is: 512.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.54 : 1,682.37 = 341.60 : x
  2. Step 2: Convert to fraction form
    1,121.54/1,682.37 = 341.60/x
  3. Step 3: Cross multiply
    1,121.54x = 1,682.37 × 341.60
  4. Step 4: Simplify right side
    1,121.54x = 574,689.18
  5. Step 5: Solve for x
    x = 574,689.18/1,121.54
  6. Step 6: Final answer
    x = 512.41

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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.