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Finding the Fourth Proportional to 194.40, 256.80 and 194.40

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Solution

The fourth proportional to 194.40, 256.80 and 194.40 is: 256.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.40 : 256.80 = 194.40 : x
  2. Step 2: Convert to fraction form
    194.40/256.80 = 194.40/x
  3. Step 3: Cross multiply
    194.40x = 256.80 × 194.40
  4. Step 4: Simplify right side
    194.40x = 49,921.92
  5. Step 5: Solve for x
    x = 49,921.92/194.40
  6. Step 6: Final answer
    x = 256.80

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.