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Finding the Fourth Proportional to 260.42, 359.21 and 155.44

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Solution

The fourth proportional to 260.42, 359.21 and 155.44 is: 214.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.42 : 359.21 = 155.44 : x
  2. Step 2: Convert to fraction form
    260.42/359.21 = 155.44/x
  3. Step 3: Cross multiply
    260.42x = 359.21 × 155.44
  4. Step 4: Simplify right side
    260.42x = 55,834.19
  5. Step 5: Solve for x
    x = 55,834.19/260.42
  6. Step 6: Final answer
    x = 214.40

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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.