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Finding the Fourth Proportional to 295.21, 407.40 and 197.16

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Solution

The fourth proportional to 295.21, 407.40 and 197.16 is: 272.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.21 : 407.40 = 197.16 : x
  2. Step 2: Convert to fraction form
    295.21/407.40 = 197.16/x
  3. Step 3: Cross multiply
    295.21x = 407.40 × 197.16
  4. Step 4: Simplify right side
    295.21x = 80,322.98
  5. Step 5: Solve for x
    x = 80,322.98/295.21
  6. Step 6: Final answer
    x = 272.09

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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.