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Finding the Fourth Proportional to 481.95, 718.83 and 438.21

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Solution

The fourth proportional to 481.95, 718.83 and 438.21 is: 653.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.95 : 718.83 = 438.21 : x
  2. Step 2: Convert to fraction form
    481.95/718.83 = 438.21/x
  3. Step 3: Cross multiply
    481.95x = 718.83 × 438.21
  4. Step 4: Simplify right side
    481.95x = 314,998.49
  5. Step 5: Solve for x
    x = 314,998.49/481.95
  6. Step 6: Final answer
    x = 653.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.