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Finding the Fourth Proportional to 482.07, 665.39 and 305.06

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Solution

The fourth proportional to 482.07, 665.39 and 305.06 is: 421.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.07 : 665.39 = 305.06 : x
  2. Step 2: Convert to fraction form
    482.07/665.39 = 305.06/x
  3. Step 3: Cross multiply
    482.07x = 665.39 × 305.06
  4. Step 4: Simplify right side
    482.07x = 202,986.30
  5. Step 5: Solve for x
    x = 202,986.30/482.07
  6. Step 6: Final answer
    x = 421.07

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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.