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Finding the Fourth Proportional to 482.49, 665.94 and 286.05

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Solution

The fourth proportional to 482.49, 665.94 and 286.05 is: 394.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.49 : 665.94 = 286.05 : x
  2. Step 2: Convert to fraction form
    482.49/665.94 = 286.05/x
  3. Step 3: Cross multiply
    482.49x = 665.94 × 286.05
  4. Step 4: Simplify right side
    482.49x = 190,492.14
  5. Step 5: Solve for x
    x = 190,492.14/482.49
  6. Step 6: Final answer
    x = 394.81

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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.