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Finding the Fourth Proportional to 450.56, 621.76 and 303.12

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Solution

The fourth proportional to 450.56, 621.76 and 303.12 is: 418.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.56 : 621.76 = 303.12 : x
  2. Step 2: Convert to fraction form
    450.56/621.76 = 303.12/x
  3. Step 3: Cross multiply
    450.56x = 621.76 × 303.12
  4. Step 4: Simplify right side
    450.56x = 188,467.89
  5. Step 5: Solve for x
    x = 188,467.89/450.56
  6. Step 6: Final answer
    x = 418.30

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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.