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Finding the Third Proportional to 809.50 and 1,157

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Solution

The third proportional to 809.50 and 1,157 is: 1,653.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    809.50 : 1,157 = 1,157 : x
  2. Step 2: Convert to fraction form
    809.50/1,157 = 1,157/x
  3. Step 3: Cross multiply
    809.50x = 1,157 × 1,157
  4. Step 4: Simplify right side
    809.50x = 1,338,649
  5. Step 5: Solve for x
    x = 1,338,649/809.50
  6. Step 6: Final answer
    x = 1,653.67

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.