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Finding the Fourth Proportional to 480.40, 719.38 and 263.73

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Solution

The fourth proportional to 480.40, 719.38 and 263.73 is: 394.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.40 : 719.38 = 263.73 : x
  2. Step 2: Convert to fraction form
    480.40/719.38 = 263.73/x
  3. Step 3: Cross multiply
    480.40x = 719.38 × 263.73
  4. Step 4: Simplify right side
    480.40x = 189,722.09
  5. Step 5: Solve for x
    x = 189,722.09/480.40
  6. Step 6: Final answer
    x = 394.93

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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.