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Finding the Fourth Proportional to 371.46, 512.13 and 305.94

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Solution

The fourth proportional to 371.46, 512.13 and 305.94 is: 421.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.46 : 512.13 = 305.94 : x
  2. Step 2: Convert to fraction form
    371.46/512.13 = 305.94/x
  3. Step 3: Cross multiply
    371.46x = 512.13 × 305.94
  4. Step 4: Simplify right side
    371.46x = 156,681.05
  5. Step 5: Solve for x
    x = 156,681.05/371.46
  6. Step 6: Final answer
    x = 421.80

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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.