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Finding the Fourth Proportional to 554.75, 765.15 and 484.66

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Solution

The fourth proportional to 554.75, 765.15 and 484.66 is: 668.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.75 : 765.15 = 484.66 : x
  2. Step 2: Convert to fraction form
    554.75/765.15 = 484.66/x
  3. Step 3: Cross multiply
    554.75x = 765.15 × 484.66
  4. Step 4: Simplify right side
    554.75x = 370,836.74
  5. Step 5: Solve for x
    x = 370,836.74/554.75
  6. Step 6: Final answer
    x = 668.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.