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Finding the Fourth Proportional to 207.46, 312.69 and 197.61

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Solution

The fourth proportional to 207.46, 312.69 and 197.61 is: 297.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.46 : 312.69 = 197.61 : x
  2. Step 2: Convert to fraction form
    207.46/312.69 = 197.61/x
  3. Step 3: Cross multiply
    207.46x = 312.69 × 197.61
  4. Step 4: Simplify right side
    207.46x = 61,790.24
  5. Step 5: Solve for x
    x = 61,790.24/207.46
  6. Step 6: Final answer
    x = 297.84

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.