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Finding the Fourth Proportional to 488.74, 674.26 and 276

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Solution

The fourth proportional to 488.74, 674.26 and 276 is: 380.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.74 : 674.26 = 276 : x
  2. Step 2: Convert to fraction form
    488.74/674.26 = 276/x
  3. Step 3: Cross multiply
    488.74x = 674.26 × 276
  4. Step 4: Simplify right side
    488.74x = 186,095.76
  5. Step 5: Solve for x
    x = 186,095.76/488.74
  6. Step 6: Final answer
    x = 380.77

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Why These Related Problems?

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