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Finding the Fourth Proportional to 312.88, 469.45 and 182.87

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Solution

The fourth proportional to 312.88, 469.45 and 182.87 is: 274.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.88 : 469.45 = 182.87 : x
  2. Step 2: Convert to fraction form
    312.88/469.45 = 182.87/x
  3. Step 3: Cross multiply
    312.88x = 469.45 × 182.87
  4. Step 4: Simplify right side
    312.88x = 85,850.09
  5. Step 5: Solve for x
    x = 85,850.09/312.88
  6. Step 6: Final answer
    x = 274.39

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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.