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Finding the Third Proportional to 328.88 and 711.38

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Solution

The third proportional to 328.88 and 711.38 is: 1,538.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.88 : 711.38 = 711.38 : x
  2. Step 2: Convert to fraction form
    328.88/711.38 = 711.38/x
  3. Step 3: Cross multiply
    328.88x = 711.38 × 711.38
  4. Step 4: Simplify right side
    328.88x = 506,054.39
  5. Step 5: Solve for x
    x = 506,054.39/328.88
  6. Step 6: Final answer
    x = 1,538.74

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.