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Finding the Fourth Proportional to 554.73, 765.55 and 306.05

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Solution

The fourth proportional to 554.73, 765.55 and 306.05 is: 422.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.73 : 765.55 = 306.05 : x
  2. Step 2: Convert to fraction form
    554.73/765.55 = 306.05/x
  3. Step 3: Cross multiply
    554.73x = 765.55 × 306.05
  4. Step 4: Simplify right side
    554.73x = 234,293.13
  5. Step 5: Solve for x
    x = 234,293.13/554.73
  6. Step 6: Final answer
    x = 422.35

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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.