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Finding the Fourth Proportional to 347.46, 518.66 and 321.77

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Solution

The fourth proportional to 347.46, 518.66 and 321.77 is: 480.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.46 : 518.66 = 321.77 : x
  2. Step 2: Convert to fraction form
    347.46/518.66 = 321.77/x
  3. Step 3: Cross multiply
    347.46x = 518.66 × 321.77
  4. Step 4: Simplify right side
    347.46x = 166,885.03
  5. Step 5: Solve for x
    x = 166,885.03/347.46
  6. Step 6: Final answer
    x = 480.30

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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.