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Finding the Third Proportional to 553.78 and 904.92

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Solution

The third proportional to 553.78 and 904.92 is: 1,478.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.78 : 904.92 = 904.92 : x
  2. Step 2: Convert to fraction form
    553.78/904.92 = 904.92/x
  3. Step 3: Cross multiply
    553.78x = 904.92 × 904.92
  4. Step 4: Simplify right side
    553.78x = 818,883.60
  5. Step 5: Solve for x
    x = 818,883.60/553.78
  6. Step 6: Final answer
    x = 1,478.71

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.