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Finding the Fourth Proportional to 576.70, 864.42 and 393.64

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Solution

The fourth proportional to 576.70, 864.42 and 393.64 is: 590.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.70 : 864.42 = 393.64 : x
  2. Step 2: Convert to fraction form
    576.70/864.42 = 393.64/x
  3. Step 3: Cross multiply
    576.70x = 864.42 × 393.64
  4. Step 4: Simplify right side
    576.70x = 340,270.29
  5. Step 5: Solve for x
    x = 340,270.29/576.70
  6. Step 6: Final answer
    x = 590.03

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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.