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Finding the Fourth Proportional to 824.15, 1,236.29 and 336.93

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Solution

The fourth proportional to 824.15, 1,236.29 and 336.93 is: 505.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.15 : 1,236.29 = 336.93 : x
  2. Step 2: Convert to fraction form
    824.15/1,236.29 = 336.93/x
  3. Step 3: Cross multiply
    824.15x = 1,236.29 × 336.93
  4. Step 4: Simplify right side
    824.15x = 416,541.51
  5. Step 5: Solve for x
    x = 416,541.51/824.15
  6. Step 6: Final answer
    x = 505.42

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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.