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Finding the Fourth Proportional to 482.58, 665.87 and 305.64

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Solution

The fourth proportional to 482.58, 665.87 and 305.64 is: 421.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.58 : 665.87 = 305.64 : x
  2. Step 2: Convert to fraction form
    482.58/665.87 = 305.64/x
  3. Step 3: Cross multiply
    482.58x = 665.87 × 305.64
  4. Step 4: Simplify right side
    482.58x = 203,514.98
  5. Step 5: Solve for x
    x = 203,514.98/482.58
  6. Step 6: Final answer
    x = 421.72

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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.