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Finding the Fourth Proportional to 576.55, 794.71 and 399.77

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Solution

The fourth proportional to 576.55, 794.71 and 399.77 is: 551.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.55 : 794.71 = 399.77 : x
  2. Step 2: Convert to fraction form
    576.55/794.71 = 399.77/x
  3. Step 3: Cross multiply
    576.55x = 794.71 × 399.77
  4. Step 4: Simplify right side
    576.55x = 317,700.72
  5. Step 5: Solve for x
    x = 317,700.72/576.55
  6. Step 6: Final answer
    x = 551.04

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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.