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Finding the Fourth Proportional to 484.89, 669.29 and 288.54

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Solution

The fourth proportional to 484.89, 669.29 and 288.54 is: 398.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.89 : 669.29 = 288.54 : x
  2. Step 2: Convert to fraction form
    484.89/669.29 = 288.54/x
  3. Step 3: Cross multiply
    484.89x = 669.29 × 288.54
  4. Step 4: Simplify right side
    484.89x = 193,116.94
  5. Step 5: Solve for x
    x = 193,116.94/484.89
  6. Step 6: Final answer
    x = 398.27

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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.