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Finding the Third Proportional to 554.63 and 788.34

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Solution

The third proportional to 554.63 and 788.34 is: 1,120.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.63 : 788.34 = 788.34 : x
  2. Step 2: Convert to fraction form
    554.63/788.34 = 788.34/x
  3. Step 3: Cross multiply
    554.63x = 788.34 × 788.34
  4. Step 4: Simplify right side
    554.63x = 621,485.87
  5. Step 5: Solve for x
    x = 621,485.87/554.63
  6. Step 6: Final answer
    x = 1,120.55

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.