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Finding the Fourth Proportional to 197.51, 295.98 and 145.74

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Solution

The fourth proportional to 197.51, 295.98 and 145.74 is: 218.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.51 : 295.98 = 145.74 : x
  2. Step 2: Convert to fraction form
    197.51/295.98 = 145.74/x
  3. Step 3: Cross multiply
    197.51x = 295.98 × 145.74
  4. Step 4: Simplify right side
    197.51x = 43,136.13
  5. Step 5: Solve for x
    x = 43,136.13/197.51
  6. Step 6: Final answer
    x = 218.41

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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.