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Finding the Fourth Proportional to 484.52, 668.58 and 285.21

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Solution

The fourth proportional to 484.52, 668.58 and 285.21 is: 393.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.52 : 668.58 = 285.21 : x
  2. Step 2: Convert to fraction form
    484.52/668.58 = 285.21/x
  3. Step 3: Cross multiply
    484.52x = 668.58 × 285.21
  4. Step 4: Simplify right side
    484.52x = 190,682.36
  5. Step 5: Solve for x
    x = 190,682.36/484.52
  6. Step 6: Final answer
    x = 393.55

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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.