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Finding the Fourth Proportional to 576.54, 864.36 and 316.61

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Solution

The fourth proportional to 576.54, 864.36 and 316.61 is: 474.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.54 : 864.36 = 316.61 : x
  2. Step 2: Convert to fraction form
    576.54/864.36 = 316.61/x
  3. Step 3: Cross multiply
    576.54x = 864.36 × 316.61
  4. Step 4: Simplify right side
    576.54x = 273,665.02
  5. Step 5: Solve for x
    x = 273,665.02/576.54
  6. Step 6: Final answer
    x = 474.67

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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.