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Finding the Fourth Proportional to 347.80, 480.13 and 216.85

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Solution

The fourth proportional to 347.80, 480.13 and 216.85 is: 299.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.80 : 480.13 = 216.85 : x
  2. Step 2: Convert to fraction form
    347.80/480.13 = 216.85/x
  3. Step 3: Cross multiply
    347.80x = 480.13 × 216.85
  4. Step 4: Simplify right side
    347.80x = 104,116.19
  5. Step 5: Solve for x
    x = 104,116.19/347.80
  6. Step 6: Final answer
    x = 299.36

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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.