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Finding the Third Proportional to 256.29 and 553.08

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Solution

The third proportional to 256.29 and 553.08 is: 1,193.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.29 : 553.08 = 553.08 : x
  2. Step 2: Convert to fraction form
    256.29/553.08 = 553.08/x
  3. Step 3: Cross multiply
    256.29x = 553.08 × 553.08
  4. Step 4: Simplify right side
    256.29x = 305,895.41
  5. Step 5: Solve for x
    x = 305,895.41/256.29
  6. Step 6: Final answer
    x = 1,193.56

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.