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Finding the Fourth Proportional to 373.90, 563.11 and 331

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Solution

The fourth proportional to 373.90, 563.11 and 331 is: 498.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.90 : 563.11 = 331 : x
  2. Step 2: Convert to fraction form
    373.90/563.11 = 331/x
  3. Step 3: Cross multiply
    373.90x = 563.11 × 331
  4. Step 4: Simplify right side
    373.90x = 186,389.41
  5. Step 5: Solve for x
    x = 186,389.41/373.90
  6. Step 6: Final answer
    x = 498.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.