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Finding the Fourth Proportional to 373.81, 515.79 and 216.45

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Solution

The fourth proportional to 373.81, 515.79 and 216.45 is: 298.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.81 : 515.79 = 216.45 : x
  2. Step 2: Convert to fraction form
    373.81/515.79 = 216.45/x
  3. Step 3: Cross multiply
    373.81x = 515.79 × 216.45
  4. Step 4: Simplify right side
    373.81x = 111,642.75
  5. Step 5: Solve for x
    x = 111,642.75/373.81
  6. Step 6: Final answer
    x = 298.66

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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.