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Finding the Third Proportional to 315 and 359.25

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Solution

The third proportional to 315 and 359.25 is: 409.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    315 : 359.25 = 359.25 : x
  2. Step 2: Convert to fraction form
    315/359.25 = 359.25/x
  3. Step 3: Cross multiply
    315x = 359.25 × 359.25
  4. Step 4: Simplify right side
    315x = 129,060.56
  5. Step 5: Solve for x
    x = 129,060.56/315
  6. Step 6: Final answer
    x = 409.72

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.