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Finding the Fourth Proportional to 554.94, 765.81 and 306.23

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Solution

The fourth proportional to 554.94, 765.81 and 306.23 is: 422.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.94 : 765.81 = 306.23 : x
  2. Step 2: Convert to fraction form
    554.94/765.81 = 306.23/x
  3. Step 3: Cross multiply
    554.94x = 765.81 × 306.23
  4. Step 4: Simplify right side
    554.94x = 234,510.17
  5. Step 5: Solve for x
    x = 234,510.17/554.94
  6. Step 6: Final answer
    x = 422.59

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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.