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Finding the Fourth Proportional to 295.56, 408 and 197.40

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Solution

The fourth proportional to 295.56, 408 and 197.40 is: 272.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.56 : 408 = 197.40 : x
  2. Step 2: Convert to fraction form
    295.56/408 = 197.40/x
  3. Step 3: Cross multiply
    295.56x = 408 × 197.40
  4. Step 4: Simplify right side
    295.56x = 80,539.20
  5. Step 5: Solve for x
    x = 80,539.20/295.56
  6. Step 6: Final answer
    x = 272.50

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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.