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Finding the Fourth Proportional to 628.94, 943.68 and 263.90

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Solution

The fourth proportional to 628.94, 943.68 and 263.90 is: 395.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.94 : 943.68 = 263.90 : x
  2. Step 2: Convert to fraction form
    628.94/943.68 = 263.90/x
  3. Step 3: Cross multiply
    628.94x = 943.68 × 263.90
  4. Step 4: Simplify right side
    628.94x = 249,037.15
  5. Step 5: Solve for x
    x = 249,037.15/628.94
  6. Step 6: Final answer
    x = 395.96

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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.