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Finding the Fourth Proportional to 312.78, 469.52 and 182.94

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Solution

The fourth proportional to 312.78, 469.52 and 182.94 is: 274.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.78 : 469.52 = 182.94 : x
  2. Step 2: Convert to fraction form
    312.78/469.52 = 182.94/x
  3. Step 3: Cross multiply
    312.78x = 469.52 × 182.94
  4. Step 4: Simplify right side
    312.78x = 85,893.99
  5. Step 5: Solve for x
    x = 85,893.99/312.78
  6. Step 6: Final answer
    x = 274.61

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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.