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Finding the Fourth Proportional to 174.90, 261.92 and 145.74

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Solution

The fourth proportional to 174.90, 261.92 and 145.74 is: 218.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.90 : 261.92 = 145.74 : x
  2. Step 2: Convert to fraction form
    174.90/261.92 = 145.74/x
  3. Step 3: Cross multiply
    174.90x = 261.92 × 145.74
  4. Step 4: Simplify right side
    174.90x = 38,172.22
  5. Step 5: Solve for x
    x = 38,172.22/174.90
  6. Step 6: Final answer
    x = 218.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.