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Finding the Fourth Proportional to 373.31, 515.36 and 353.21

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Solution

The fourth proportional to 373.31, 515.36 and 353.21 is: 487.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.31 : 515.36 = 353.21 : x
  2. Step 2: Convert to fraction form
    373.31/515.36 = 353.21/x
  3. Step 3: Cross multiply
    373.31x = 515.36 × 353.21
  4. Step 4: Simplify right side
    373.31x = 182,030.31
  5. Step 5: Solve for x
    x = 182,030.31/373.31
  6. Step 6: Final answer
    x = 487.61

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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.