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Finding the Third Proportional to 478.88 and 720.94

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Solution

The third proportional to 478.88 and 720.94 is: 1,085.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.88 : 720.94 = 720.94 : x
  2. Step 2: Convert to fraction form
    478.88/720.94 = 720.94/x
  3. Step 3: Cross multiply
    478.88x = 720.94 × 720.94
  4. Step 4: Simplify right side
    478.88x = 519,750.88
  5. Step 5: Solve for x
    x = 519,750.88/478.88
  6. Step 6: Final answer
    x = 1,085.36

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.