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Finding the Third Proportional to 346.78 and 783.74

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Solution

The third proportional to 346.78 and 783.74 is: 1,771.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.78 : 783.74 = 783.74 : x
  2. Step 2: Convert to fraction form
    346.78/783.74 = 783.74/x
  3. Step 3: Cross multiply
    346.78x = 783.74 × 783.74
  4. Step 4: Simplify right side
    346.78x = 614,245.69
  5. Step 5: Solve for x
    x = 614,245.69/346.78
  6. Step 6: Final answer
    x = 1,771.28

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Why These Related Problems?

These problems maintain the same ratio (2.26) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.