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Finding the Third Proportional to 554.69 and 858.75

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Solution

The third proportional to 554.69 and 858.75 is: 1,329.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.69 : 858.75 = 858.75 : x
  2. Step 2: Convert to fraction form
    554.69/858.75 = 858.75/x
  3. Step 3: Cross multiply
    554.69x = 858.75 × 858.75
  4. Step 4: Simplify right side
    554.69x = 737,451.56
  5. Step 5: Solve for x
    x = 737,451.56/554.69
  6. Step 6: Final answer
    x = 1,329.49

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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.