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Finding the Third Proportional to 454.20 and 666.35

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Solution

The third proportional to 454.20 and 666.35 is: 977.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.20 : 666.35 = 666.35 : x
  2. Step 2: Convert to fraction form
    454.20/666.35 = 666.35/x
  3. Step 3: Cross multiply
    454.20x = 666.35 × 666.35
  4. Step 4: Simplify right side
    454.20x = 444,024.40
  5. Step 5: Solve for x
    x = 444,024.40/454.20
  6. Step 6: Final answer
    x = 977.59

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.