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Finding the Fourth Proportional to 373.50, 515.43 and 218.34

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Solution

The fourth proportional to 373.50, 515.43 and 218.34 is: 301.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.50 : 515.43 = 218.34 : x
  2. Step 2: Convert to fraction form
    373.50/515.43 = 218.34/x
  3. Step 3: Cross multiply
    373.50x = 515.43 × 218.34
  4. Step 4: Simplify right side
    373.50x = 112,538.99
  5. Step 5: Solve for x
    x = 112,538.99/373.50
  6. Step 6: Final answer
    x = 301.31

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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.