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Finding the Third Proportional to 491.06 and 577.55

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Solution

The third proportional to 491.06 and 577.55 is: 679.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.06 : 577.55 = 577.55 : x
  2. Step 2: Convert to fraction form
    491.06/577.55 = 577.55/x
  3. Step 3: Cross multiply
    491.06x = 577.55 × 577.55
  4. Step 4: Simplify right side
    491.06x = 333,560.39
  5. Step 5: Solve for x
    x = 333,560.39/491.06
  6. Step 6: Final answer
    x = 679.26

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.