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Finding the Fourth Proportional to 315.82, 434.74 and 273.80

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Solution

The fourth proportional to 315.82, 434.74 and 273.80 is: 376.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.82 : 434.74 = 273.80 : x
  2. Step 2: Convert to fraction form
    315.82/434.74 = 273.80/x
  3. Step 3: Cross multiply
    315.82x = 434.74 × 273.80
  4. Step 4: Simplify right side
    315.82x = 119,031.81
  5. Step 5: Solve for x
    x = 119,031.81/315.82
  6. Step 6: Final answer
    x = 376.90

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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.