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Finding the Fourth Proportional to 628.94, 943.45 and 263.77

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Solution

The fourth proportional to 628.94, 943.45 and 263.77 is: 395.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.94 : 943.45 = 263.77 : x
  2. Step 2: Convert to fraction form
    628.94/943.45 = 263.77/x
  3. Step 3: Cross multiply
    628.94x = 943.45 × 263.77
  4. Step 4: Simplify right side
    628.94x = 248,850.79
  5. Step 5: Solve for x
    x = 248,850.79/628.94
  6. Step 6: Final answer
    x = 395.67

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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.