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Finding the Third Proportional to 670.78 and 1,037.81

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Solution

The third proportional to 670.78 and 1,037.81 is: 1,605.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.78 : 1,037.81 = 1,037.81 : x
  2. Step 2: Convert to fraction form
    670.78/1,037.81 = 1,037.81/x
  3. Step 3: Cross multiply
    670.78x = 1,037.81 × 1,037.81
  4. Step 4: Simplify right side
    670.78x = 1,077,054.79
  5. Step 5: Solve for x
    x = 1,077,054.79/670.78
  6. Step 6: Final answer
    x = 1,605.67

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.