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Finding the Fourth Proportional to 484.61, 668.76 and 274.79

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Solution

The fourth proportional to 484.61, 668.76 and 274.79 is: 379.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.61 : 668.76 = 274.79 : x
  2. Step 2: Convert to fraction form
    484.61/668.76 = 274.79/x
  3. Step 3: Cross multiply
    484.61x = 668.76 × 274.79
  4. Step 4: Simplify right side
    484.61x = 183,765.22
  5. Step 5: Solve for x
    x = 183,765.22/484.61
  6. Step 6: Final answer
    x = 379.21

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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.