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Finding the Fourth Proportional to 674.70, 1,011.30 and 263.76

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Solution

The fourth proportional to 674.70, 1,011.30 and 263.76 is: 395.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.70 : 1,011.30 = 263.76 : x
  2. Step 2: Convert to fraction form
    674.70/1,011.30 = 263.76/x
  3. Step 3: Cross multiply
    674.70x = 1,011.30 × 263.76
  4. Step 4: Simplify right side
    674.70x = 266,735.43
  5. Step 5: Solve for x
    x = 266,735.43/674.70
  6. Step 6: Final answer
    x = 395.34

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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.