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Finding the Fourth Proportional to 484.21, 668.21 and 285.06

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Solution

The fourth proportional to 484.21, 668.21 and 285.06 is: 393.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.21 : 668.21 = 285.06 : x
  2. Step 2: Convert to fraction form
    484.21/668.21 = 285.06/x
  3. Step 3: Cross multiply
    484.21x = 668.21 × 285.06
  4. Step 4: Simplify right side
    484.21x = 190,478.52
  5. Step 5: Solve for x
    x = 190,478.52/484.21
  6. Step 6: Final answer
    x = 393.38

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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.