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Finding the Fourth Proportional to 555.05, 765.78 and 333.92

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Solution

The fourth proportional to 555.05, 765.78 and 333.92 is: 460.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.05 : 765.78 = 333.92 : x
  2. Step 2: Convert to fraction form
    555.05/765.78 = 333.92/x
  3. Step 3: Cross multiply
    555.05x = 765.78 × 333.92
  4. Step 4: Simplify right side
    555.05x = 255,705.43
  5. Step 5: Solve for x
    x = 255,705.43/555.05
  6. Step 6: Final answer
    x = 460.69

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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.