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Finding the Fourth Proportional to 576.21, 794.92 and 389.63

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Solution

The fourth proportional to 576.21, 794.92 and 389.63 is: 537.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.21 : 794.92 = 389.63 : x
  2. Step 2: Convert to fraction form
    576.21/794.92 = 389.63/x
  3. Step 3: Cross multiply
    576.21x = 794.92 × 389.63
  4. Step 4: Simplify right side
    576.21x = 309,725.69
  5. Step 5: Solve for x
    x = 309,725.69/576.21
  6. Step 6: Final answer
    x = 537.52

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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.