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Finding the Third Proportional to 328.31 and 715.13

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Solution

The third proportional to 328.31 and 715.13 is: 1,557.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.31 : 715.13 = 715.13 : x
  2. Step 2: Convert to fraction form
    328.31/715.13 = 715.13/x
  3. Step 3: Cross multiply
    328.31x = 715.13 × 715.13
  4. Step 4: Simplify right side
    328.31x = 511,403.77
  5. Step 5: Solve for x
    x = 511,403.77/328.31
  6. Step 6: Final answer
    x = 1,557.67

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.