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Finding the Fourth Proportional to 174.85, 241.35 and 156.40

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Solution

The fourth proportional to 174.85, 241.35 and 156.40 is: 215.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.85 : 241.35 = 156.40 : x
  2. Step 2: Convert to fraction form
    174.85/241.35 = 156.40/x
  3. Step 3: Cross multiply
    174.85x = 241.35 × 156.40
  4. Step 4: Simplify right side
    174.85x = 37,745.93
  5. Step 5: Solve for x
    x = 37,745.93/174.85
  6. Step 6: Final answer
    x = 215.88

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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.