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Finding the Third Proportional to 313.95 and 659.94

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Solution

The third proportional to 313.95 and 659.94 is: 1,387.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.95 : 659.94 = 659.94 : x
  2. Step 2: Convert to fraction form
    313.95/659.94 = 659.94/x
  3. Step 3: Cross multiply
    313.95x = 659.94 × 659.94
  4. Step 4: Simplify right side
    313.95x = 435,526.53
  5. Step 5: Solve for x
    x = 435,526.53/313.95
  6. Step 6: Final answer
    x = 1,387.23

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.