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Finding the Third Proportional to 1,237.78 and 1,370.67

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Solution

The third proportional to 1,237.78 and 1,370.67 is: 1,517.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.78 : 1,370.67 = 1,370.67 : x
  2. Step 2: Convert to fraction form
    1,237.78/1,370.67 = 1,370.67/x
  3. Step 3: Cross multiply
    1,237.78x = 1,370.67 × 1,370.67
  4. Step 4: Simplify right side
    1,237.78x = 1,878,741.39
  5. Step 5: Solve for x
    x = 1,878,741.39/1,237.78
  6. Step 6: Final answer
    x = 1,517.83

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.