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Finding the Fourth Proportional to 576.95, 796.06 and 399.63

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Solution

The fourth proportional to 576.95, 796.06 and 399.63 is: 551.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.95 : 796.06 = 399.63 : x
  2. Step 2: Convert to fraction form
    576.95/796.06 = 399.63/x
  3. Step 3: Cross multiply
    576.95x = 796.06 × 399.63
  4. Step 4: Simplify right side
    576.95x = 318,132.94
  5. Step 5: Solve for x
    x = 318,132.94/576.95
  6. Step 6: Final answer
    x = 551.41

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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.