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Finding the Fourth Proportional to 343.03, 513.40 and 261.41

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Solution

The fourth proportional to 343.03, 513.40 and 261.41 is: 391.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.03 : 513.40 = 261.41 : x
  2. Step 2: Convert to fraction form
    343.03/513.40 = 261.41/x
  3. Step 3: Cross multiply
    343.03x = 513.40 × 261.41
  4. Step 4: Simplify right side
    343.03x = 134,207.89
  5. Step 5: Solve for x
    x = 134,207.89/343.03
  6. Step 6: Final answer
    x = 391.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.