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Finding the Fourth Proportional to 312.60, 466.62 and 263.88

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Solution

The fourth proportional to 312.60, 466.62 and 263.88 is: 393.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.60 : 466.62 = 263.88 : x
  2. Step 2: Convert to fraction form
    312.60/466.62 = 263.88/x
  3. Step 3: Cross multiply
    312.60x = 466.62 × 263.88
  4. Step 4: Simplify right side
    312.60x = 123,131.69
  5. Step 5: Solve for x
    x = 123,131.69/312.60
  6. Step 6: Final answer
    x = 393.90

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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.