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Finding the Fourth Proportional to 315.70, 434.37 and 308.41

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Solution

The fourth proportional to 315.70, 434.37 and 308.41 is: 424.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.70 : 434.37 = 308.41 : x
  2. Step 2: Convert to fraction form
    315.70/434.37 = 308.41/x
  3. Step 3: Cross multiply
    315.70x = 434.37 × 308.41
  4. Step 4: Simplify right side
    315.70x = 133,964.05
  5. Step 5: Solve for x
    x = 133,964.05/315.70
  6. Step 6: Final answer
    x = 424.34

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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.