Home / 820.08-1,230.21-272.14

Finding the Fourth Proportional to 820.08, 1,230.21 and 272.14

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Solution

The fourth proportional to 820.08, 1,230.21 and 272.14 is: 408.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    820.08 : 1,230.21 = 272.14 : x
  2. Step 2: Convert to fraction form
    820.08/1,230.21 = 272.14/x
  3. Step 3: Cross multiply
    820.08x = 1,230.21 × 272.14
  4. Step 4: Simplify right side
    820.08x = 334,789.35
  5. Step 5: Solve for x
    x = 334,789.35/820.08
  6. Step 6: Final answer
    x = 408.24

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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.