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Finding the Fourth Proportional to 450.68, 621.74 and 303.40

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Solution

The fourth proportional to 450.68, 621.74 and 303.40 is: 418.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.68 : 621.74 = 303.40 : x
  2. Step 2: Convert to fraction form
    450.68/621.74 = 303.40/x
  3. Step 3: Cross multiply
    450.68x = 621.74 × 303.40
  4. Step 4: Simplify right side
    450.68x = 188,635.92
  5. Step 5: Solve for x
    x = 188,635.92/450.68
  6. Step 6: Final answer
    x = 418.56

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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.