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Finding the Fourth Proportional to 662.32, 991.56 and 353.56

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Solution

The fourth proportional to 662.32, 991.56 and 353.56 is: 529.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.32 : 991.56 = 353.56 : x
  2. Step 2: Convert to fraction form
    662.32/991.56 = 353.56/x
  3. Step 3: Cross multiply
    662.32x = 991.56 × 353.56
  4. Step 4: Simplify right side
    662.32x = 350,575.95
  5. Step 5: Solve for x
    x = 350,575.95/662.32
  6. Step 6: Final answer
    x = 529.32

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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.