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Finding the Fourth Proportional to 205.54, 283.30 and 156.33

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Solution

The fourth proportional to 205.54, 283.30 and 156.33 is: 215.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.54 : 283.30 = 156.33 : x
  2. Step 2: Convert to fraction form
    205.54/283.30 = 156.33/x
  3. Step 3: Cross multiply
    205.54x = 283.30 × 156.33
  4. Step 4: Simplify right side
    205.54x = 44,287.90
  5. Step 5: Solve for x
    x = 44,287.90/205.54
  6. Step 6: Final answer
    x = 215.47

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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.