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Finding the Fourth Proportional to 312.12, 466.44 and 268.76

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Solution

The fourth proportional to 312.12, 466.44 and 268.76 is: 401.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.12 : 466.44 = 268.76 : x
  2. Step 2: Convert to fraction form
    312.12/466.44 = 268.76/x
  3. Step 3: Cross multiply
    312.12x = 466.44 × 268.76
  4. Step 4: Simplify right side
    312.12x = 125,360.41
  5. Step 5: Solve for x
    x = 125,360.41/312.12
  6. Step 6: Final answer
    x = 401.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.