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Finding the Fourth Proportional to 484.98, 669.29 and 275.15

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Solution

The fourth proportional to 484.98, 669.29 and 275.15 is: 379.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.98 : 669.29 = 275.15 : x
  2. Step 2: Convert to fraction form
    484.98/669.29 = 275.15/x
  3. Step 3: Cross multiply
    484.98x = 669.29 × 275.15
  4. Step 4: Simplify right side
    484.98x = 184,150.42
  5. Step 5: Solve for x
    x = 184,150.42/484.98
  6. Step 6: Final answer
    x = 379.71

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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.