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Finding the Fourth Proportional to 294.80, 407.18 and 196.40

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Solution

The fourth proportional to 294.80, 407.18 and 196.40 is: 271.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.80 : 407.18 = 196.40 : x
  2. Step 2: Convert to fraction form
    294.80/407.18 = 196.40/x
  3. Step 3: Cross multiply
    294.80x = 407.18 × 196.40
  4. Step 4: Simplify right side
    294.80x = 79,970.15
  5. Step 5: Solve for x
    x = 79,970.15/294.80
  6. Step 6: Final answer
    x = 271.27

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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.