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Finding the Fourth Proportional to 351.72, 486.12 and 264.24

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Solution

The fourth proportional to 351.72, 486.12 and 264.24 is: 365.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.72 : 486.12 = 264.24 : x
  2. Step 2: Convert to fraction form
    351.72/486.12 = 264.24/x
  3. Step 3: Cross multiply
    351.72x = 486.12 × 264.24
  4. Step 4: Simplify right side
    351.72x = 128,449.92
  5. Step 5: Solve for x
    x = 128,449.92/351.72
  6. Step 6: Final answer
    x = 365.21

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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.