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Finding the Fourth Proportional to 483.05, 666.66 and 286.56

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Solution

The fourth proportional to 483.05, 666.66 and 286.56 is: 395.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.05 : 666.66 = 286.56 : x
  2. Step 2: Convert to fraction form
    483.05/666.66 = 286.56/x
  3. Step 3: Cross multiply
    483.05x = 666.66 × 286.56
  4. Step 4: Simplify right side
    483.05x = 191,038.09
  5. Step 5: Solve for x
    x = 191,038.09/483.05
  6. Step 6: Final answer
    x = 395.49

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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.