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Finding the Fourth Proportional to 353.43, 488.21 and 270.36

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Solution

The fourth proportional to 353.43, 488.21 and 270.36 is: 373.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.43 : 488.21 = 270.36 : x
  2. Step 2: Convert to fraction form
    353.43/488.21 = 270.36/x
  3. Step 3: Cross multiply
    353.43x = 488.21 × 270.36
  4. Step 4: Simplify right side
    353.43x = 131,991.10
  5. Step 5: Solve for x
    x = 131,991.10/353.43
  6. Step 6: Final answer
    x = 373.46

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.