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Finding the Fourth Proportional to 554.84, 765.72 and 306.17

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Solution

The fourth proportional to 554.84, 765.72 and 306.17 is: 422.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.84 : 765.72 = 306.17 : x
  2. Step 2: Convert to fraction form
    554.84/765.72 = 306.17/x
  3. Step 3: Cross multiply
    554.84x = 765.72 × 306.17
  4. Step 4: Simplify right side
    554.84x = 234,436.66
  5. Step 5: Solve for x
    x = 234,436.66/554.84
  6. Step 6: Final answer
    x = 422.53

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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.