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Finding the Third Proportional to 421.03 and 577.55

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Solution

The third proportional to 421.03 and 577.55 is: 792.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.03 : 577.55 = 577.55 : x
  2. Step 2: Convert to fraction form
    421.03/577.55 = 577.55/x
  3. Step 3: Cross multiply
    421.03x = 577.55 × 577.55
  4. Step 4: Simplify right side
    421.03x = 333,560.39
  5. Step 5: Solve for x
    x = 333,560.39/421.03
  6. Step 6: Final answer
    x = 792.25

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.