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Finding the Fourth Proportional to 346.26, 477.39 and 287.03

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Solution

The fourth proportional to 346.26, 477.39 and 287.03 is: 395.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.26 : 477.39 = 287.03 : x
  2. Step 2: Convert to fraction form
    346.26/477.39 = 287.03/x
  3. Step 3: Cross multiply
    346.26x = 477.39 × 287.03
  4. Step 4: Simplify right side
    346.26x = 137,025.25
  5. Step 5: Solve for x
    x = 137,025.25/346.26
  6. Step 6: Final answer
    x = 395.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.