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Finding the Fourth Proportional to 351.21, 529.11 and 266.25

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Solution

The fourth proportional to 351.21, 529.11 and 266.25 is: 401.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.21 : 529.11 = 266.25 : x
  2. Step 2: Convert to fraction form
    351.21/529.11 = 266.25/x
  3. Step 3: Cross multiply
    351.21x = 529.11 × 266.25
  4. Step 4: Simplify right side
    351.21x = 140,875.54
  5. Step 5: Solve for x
    x = 140,875.54/351.21
  6. Step 6: Final answer
    x = 401.11

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.