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Finding the Fourth Proportional to 351.22, 484.60 and 253

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Solution

The fourth proportional to 351.22, 484.60 and 253 is: 349.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.22 : 484.60 = 253 : x
  2. Step 2: Convert to fraction form
    351.22/484.60 = 253/x
  3. Step 3: Cross multiply
    351.22x = 484.60 × 253
  4. Step 4: Simplify right side
    351.22x = 122,603.80
  5. Step 5: Solve for x
    x = 122,603.80/351.22
  6. Step 6: Final answer
    x = 349.08

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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.