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Finding the Fourth Proportional to 449.84, 621.02 and 303.25

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Solution

The fourth proportional to 449.84, 621.02 and 303.25 is: 418.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.84 : 621.02 = 303.25 : x
  2. Step 2: Convert to fraction form
    449.84/621.02 = 303.25/x
  3. Step 3: Cross multiply
    449.84x = 621.02 × 303.25
  4. Step 4: Simplify right side
    449.84x = 188,324.32
  5. Step 5: Solve for x
    x = 188,324.32/449.84
  6. Step 6: Final answer
    x = 418.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.