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Finding the Fourth Proportional to 839.38, 1,258.08 and 352.30

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Solution

The fourth proportional to 839.38, 1,258.08 and 352.30 is: 528.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.38 : 1,258.08 = 352.30 : x
  2. Step 2: Convert to fraction form
    839.38/1,258.08 = 352.30/x
  3. Step 3: Cross multiply
    839.38x = 1,258.08 × 352.30
  4. Step 4: Simplify right side
    839.38x = 443,221.58
  5. Step 5: Solve for x
    x = 443,221.58/839.38
  6. Step 6: Final answer
    x = 528.03

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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.