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Finding the Fourth Proportional to 838.28, 1,258.26 and 351.64

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Solution

The fourth proportional to 838.28, 1,258.26 and 351.64 is: 527.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.28 : 1,258.26 = 351.64 : x
  2. Step 2: Convert to fraction form
    838.28/1,258.26 = 351.64/x
  3. Step 3: Cross multiply
    838.28x = 1,258.26 × 351.64
  4. Step 4: Simplify right side
    838.28x = 442,454.55
  5. Step 5: Solve for x
    x = 442,454.55/838.28
  6. Step 6: Final answer
    x = 527.81

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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.