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Finding the Fourth Proportional to 480.66, 720.64 and 155.85

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Solution

The fourth proportional to 480.66, 720.64 and 155.85 is: 233.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.66 : 720.64 = 155.85 : x
  2. Step 2: Convert to fraction form
    480.66/720.64 = 155.85/x
  3. Step 3: Cross multiply
    480.66x = 720.64 × 155.85
  4. Step 4: Simplify right side
    480.66x = 112,311.74
  5. Step 5: Solve for x
    x = 112,311.74/480.66
  6. Step 6: Final answer
    x = 233.66

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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.