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Finding the Fourth Proportional to 318.77, 440.10 and 225.62

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Solution

The fourth proportional to 318.77, 440.10 and 225.62 is: 311.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.77 : 440.10 = 225.62 : x
  2. Step 2: Convert to fraction form
    318.77/440.10 = 225.62/x
  3. Step 3: Cross multiply
    318.77x = 440.10 × 225.62
  4. Step 4: Simplify right side
    318.77x = 99,295.36
  5. Step 5: Solve for x
    x = 99,295.36/318.77
  6. Step 6: Final answer
    x = 311.50

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.