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Finding the Fourth Proportional to 555.05, 765.95 and 306.36

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Solution

The fourth proportional to 555.05, 765.95 and 306.36 is: 422.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.05 : 765.95 = 306.36 : x
  2. Step 2: Convert to fraction form
    555.05/765.95 = 306.36/x
  3. Step 3: Cross multiply
    555.05x = 765.95 × 306.36
  4. Step 4: Simplify right side
    555.05x = 234,658.93
  5. Step 5: Solve for x
    x = 234,658.93/555.05
  6. Step 6: Final answer
    x = 422.77

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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.