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Finding the Fourth Proportional to 554.82, 765.63 and 321.95

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Solution

The fourth proportional to 554.82, 765.63 and 321.95 is: 444.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.82 : 765.63 = 321.95 : x
  2. Step 2: Convert to fraction form
    554.82/765.63 = 321.95/x
  3. Step 3: Cross multiply
    554.82x = 765.63 × 321.95
  4. Step 4: Simplify right side
    554.82x = 246,494.58
  5. Step 5: Solve for x
    x = 246,494.58/554.82
  6. Step 6: Final answer
    x = 444.28

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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.