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Finding the Fourth Proportional to 553.08, 762.99 and 331.64

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Solution

The fourth proportional to 553.08, 762.99 and 331.64 is: 457.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.08 : 762.99 = 331.64 : x
  2. Step 2: Convert to fraction form
    553.08/762.99 = 331.64/x
  3. Step 3: Cross multiply
    553.08x = 762.99 × 331.64
  4. Step 4: Simplify right side
    553.08x = 253,039.91
  5. Step 5: Solve for x
    x = 253,039.91/553.08
  6. Step 6: Final answer
    x = 457.51

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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.