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Finding the Third Proportional to 145.23 and 309.68

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Solution

The third proportional to 145.23 and 309.68 is: 660.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.23 : 309.68 = 309.68 : x
  2. Step 2: Convert to fraction form
    145.23/309.68 = 309.68/x
  3. Step 3: Cross multiply
    145.23x = 309.68 × 309.68
  4. Step 4: Simplify right side
    145.23x = 95,903.32
  5. Step 5: Solve for x
    x = 95,903.32/145.23
  6. Step 6: Final answer
    x = 660.35

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.