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Finding the Fourth Proportional to 824.20, 1,236.06 and 304.20

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Solution

The fourth proportional to 824.20, 1,236.06 and 304.20 is: 456.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.20 : 1,236.06 = 304.20 : x
  2. Step 2: Convert to fraction form
    824.20/1,236.06 = 304.20/x
  3. Step 3: Cross multiply
    824.20x = 1,236.06 × 304.20
  4. Step 4: Simplify right side
    824.20x = 376,009.45
  5. Step 5: Solve for x
    x = 376,009.45/824.20
  6. Step 6: Final answer
    x = 456.21

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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.