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Finding the Fourth Proportional to 484.79, 669.28 and 319.48

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Solution

The fourth proportional to 484.79, 669.28 and 319.48 is: 441.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.79 : 669.28 = 319.48 : x
  2. Step 2: Convert to fraction form
    484.79/669.28 = 319.48/x
  3. Step 3: Cross multiply
    484.79x = 669.28 × 319.48
  4. Step 4: Simplify right side
    484.79x = 213,821.57
  5. Step 5: Solve for x
    x = 213,821.57/484.79
  6. Step 6: Final answer
    x = 441.06

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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.