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Finding the Fourth Proportional to 576.93, 864.90 and 394.68

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Solution

The fourth proportional to 576.93, 864.90 and 394.68 is: 591.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.93 : 864.90 = 394.68 : x
  2. Step 2: Convert to fraction form
    576.93/864.90 = 394.68/x
  3. Step 3: Cross multiply
    576.93x = 864.90 × 394.68
  4. Step 4: Simplify right side
    576.93x = 341,358.73
  5. Step 5: Solve for x
    x = 341,358.73/576.93
  6. Step 6: Final answer
    x = 591.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.