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Finding the Fourth Proportional to 353.13, 528.84 and 215.76

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Solution

The fourth proportional to 353.13, 528.84 and 215.76 is: 323.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.13 : 528.84 = 215.76 : x
  2. Step 2: Convert to fraction form
    353.13/528.84 = 215.76/x
  3. Step 3: Cross multiply
    353.13x = 528.84 × 215.76
  4. Step 4: Simplify right side
    353.13x = 114,102.52
  5. Step 5: Solve for x
    x = 114,102.52/353.13
  6. Step 6: Final answer
    x = 323.12

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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.