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Finding the Fourth Proportional to 480.04, 720.08 and 388.91

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Solution

The fourth proportional to 480.04, 720.08 and 388.91 is: 583.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.04 : 720.08 = 388.91 : x
  2. Step 2: Convert to fraction form
    480.04/720.08 = 388.91/x
  3. Step 3: Cross multiply
    480.04x = 720.08 × 388.91
  4. Step 4: Simplify right side
    480.04x = 280,046.31
  5. Step 5: Solve for x
    x = 280,046.31/480.04
  6. Step 6: Final answer
    x = 583.38

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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.