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Finding the Fourth Proportional to 480.53, 720.79 and 388.26

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Solution

The fourth proportional to 480.53, 720.79 and 388.26 is: 582.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.53 : 720.79 = 388.26 : x
  2. Step 2: Convert to fraction form
    480.53/720.79 = 388.26/x
  3. Step 3: Cross multiply
    480.53x = 720.79 × 388.26
  4. Step 4: Simplify right side
    480.53x = 279,852.95
  5. Step 5: Solve for x
    x = 279,852.95/480.53
  6. Step 6: Final answer
    x = 582.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.