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Finding the Fourth Proportional to 484.72, 727.18 and 289.66

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Solution

The fourth proportional to 484.72, 727.18 and 289.66 is: 434.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.72 : 727.18 = 289.66 : x
  2. Step 2: Convert to fraction form
    484.72/727.18 = 289.66/x
  3. Step 3: Cross multiply
    484.72x = 727.18 × 289.66
  4. Step 4: Simplify right side
    484.72x = 210,634.96
  5. Step 5: Solve for x
    x = 210,634.96/484.72
  6. Step 6: Final answer
    x = 434.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.