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Finding the Fourth Proportional to 480.24, 662.29 and 356.21

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Solution

The fourth proportional to 480.24, 662.29 and 356.21 is: 491.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.24 : 662.29 = 356.21 : x
  2. Step 2: Convert to fraction form
    480.24/662.29 = 356.21/x
  3. Step 3: Cross multiply
    480.24x = 662.29 × 356.21
  4. Step 4: Simplify right side
    480.24x = 235,912.60
  5. Step 5: Solve for x
    x = 235,912.60/480.24
  6. Step 6: Final answer
    x = 491.24

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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.