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Finding the Fourth Proportional to 286.04, 394.70 and 161.70

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Solution

The fourth proportional to 286.04, 394.70 and 161.70 is: 223.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.04 : 394.70 = 161.70 : x
  2. Step 2: Convert to fraction form
    286.04/394.70 = 161.70/x
  3. Step 3: Cross multiply
    286.04x = 394.70 × 161.70
  4. Step 4: Simplify right side
    286.04x = 63,822.99
  5. Step 5: Solve for x
    x = 63,822.99/286.04
  6. Step 6: Final answer
    x = 223.13

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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.