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Finding the Fourth Proportional to 371.70, 554.82 and 345

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Solution

The fourth proportional to 371.70, 554.82 and 345 is: 514.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.70 : 554.82 = 345 : x
  2. Step 2: Convert to fraction form
    371.70/554.82 = 345/x
  3. Step 3: Cross multiply
    371.70x = 554.82 × 345
  4. Step 4: Simplify right side
    371.70x = 191,412.90
  5. Step 5: Solve for x
    x = 191,412.90/371.70
  6. Step 6: Final answer
    x = 514.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.