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Finding the Fourth Proportional to 373.45, 515.35 and 216.09

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Solution

The fourth proportional to 373.45, 515.35 and 216.09 is: 298.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.45 : 515.35 = 216.09 : x
  2. Step 2: Convert to fraction form
    373.45/515.35 = 216.09/x
  3. Step 3: Cross multiply
    373.45x = 515.35 × 216.09
  4. Step 4: Simplify right side
    373.45x = 111,361.98
  5. Step 5: Solve for x
    x = 111,361.98/373.45
  6. Step 6: Final answer
    x = 298.20

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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.