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Finding the Fourth Proportional to 311.61, 467.80 and 174.77

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Solution

The fourth proportional to 311.61, 467.80 and 174.77 is: 262.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.61 : 467.80 = 174.77 : x
  2. Step 2: Convert to fraction form
    311.61/467.80 = 174.77/x
  3. Step 3: Cross multiply
    311.61x = 467.80 × 174.77
  4. Step 4: Simplify right side
    311.61x = 81,754.63
  5. Step 5: Solve for x
    x = 81,754.63/311.61
  6. Step 6: Final answer
    x = 262.36

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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.