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Finding the Fourth Proportional to 245.61, 339.90 and 197.01

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Solution

The fourth proportional to 245.61, 339.90 and 197.01 is: 272.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.61 : 339.90 = 197.01 : x
  2. Step 2: Convert to fraction form
    245.61/339.90 = 197.01/x
  3. Step 3: Cross multiply
    245.61x = 339.90 × 197.01
  4. Step 4: Simplify right side
    245.61x = 66,963.70
  5. Step 5: Solve for x
    x = 66,963.70/245.61
  6. Step 6: Final answer
    x = 272.64

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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.