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Finding the Fourth Proportional to 371.99, 513.84 and 310.03

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Solution

The fourth proportional to 371.99, 513.84 and 310.03 is: 428.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.99 : 513.84 = 310.03 : x
  2. Step 2: Convert to fraction form
    371.99/513.84 = 310.03/x
  3. Step 3: Cross multiply
    371.99x = 513.84 × 310.03
  4. Step 4: Simplify right side
    371.99x = 159,305.69
  5. Step 5: Solve for x
    x = 159,305.69/371.99
  6. Step 6: Final answer
    x = 428.25

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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.