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Finding the Third Proportional to 474.75 and 729.28

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Solution

The third proportional to 474.75 and 729.28 is: 1,120.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.75 : 729.28 = 729.28 : x
  2. Step 2: Convert to fraction form
    474.75/729.28 = 729.28/x
  3. Step 3: Cross multiply
    474.75x = 729.28 × 729.28
  4. Step 4: Simplify right side
    474.75x = 531,851.14
  5. Step 5: Solve for x
    x = 531,851.14/474.75
  6. Step 6: Final answer
    x = 1,120.28

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.