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Finding the Fourth Proportional to 1,414.08, 2,121.20 and 548.32

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Solution

The fourth proportional to 1,414.08, 2,121.20 and 548.32 is: 822.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,414.08 : 2,121.20 = 548.32 : x
  2. Step 2: Convert to fraction form
    1,414.08/2,121.20 = 548.32/x
  3. Step 3: Cross multiply
    1,414.08x = 2,121.20 × 548.32
  4. Step 4: Simplify right side
    1,414.08x = 1,163,096.38
  5. Step 5: Solve for x
    x = 1,163,096.38/1,414.08
  6. Step 6: Final answer
    x = 822.51

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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.