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Finding the Fourth Proportional to 480.15, 720.28 and 155.44

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Solution

The fourth proportional to 480.15, 720.28 and 155.44 is: 233.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.15 : 720.28 = 155.44 : x
  2. Step 2: Convert to fraction form
    480.15/720.28 = 155.44/x
  3. Step 3: Cross multiply
    480.15x = 720.28 × 155.44
  4. Step 4: Simplify right side
    480.15x = 111,961.42
  5. Step 5: Solve for x
    x = 111,961.42/480.15
  6. Step 6: Final answer
    x = 233.18

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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.