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Finding the Third Proportional to 715.22 and 1,071.28

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Solution

The third proportional to 715.22 and 1,071.28 is: 1,604.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.22 : 1,071.28 = 1,071.28 : x
  2. Step 2: Convert to fraction form
    715.22/1,071.28 = 1,071.28/x
  3. Step 3: Cross multiply
    715.22x = 1,071.28 × 1,071.28
  4. Step 4: Simplify right side
    715.22x = 1,147,643.52
  5. Step 5: Solve for x
    x = 1,147,643.52/715.22
  6. Step 6: Final answer
    x = 1,604.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.