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Finding the Fourth Proportional to 260.33, 359.21 and 155.40

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Solution

The fourth proportional to 260.33, 359.21 and 155.40 is: 214.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.33 : 359.21 = 155.40 : x
  2. Step 2: Convert to fraction form
    260.33/359.21 = 155.40/x
  3. Step 3: Cross multiply
    260.33x = 359.21 × 155.40
  4. Step 4: Simplify right side
    260.33x = 55,820.46
  5. Step 5: Solve for x
    x = 55,820.46/260.33
  6. Step 6: Final answer
    x = 214.43

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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.