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Finding the Fourth Proportional to 450.69, 621.90 and 254.21

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Solution

The fourth proportional to 450.69, 621.90 and 254.21 is: 350.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.69 : 621.90 = 254.21 : x
  2. Step 2: Convert to fraction form
    450.69/621.90 = 254.21/x
  3. Step 3: Cross multiply
    450.69x = 621.90 × 254.21
  4. Step 4: Simplify right side
    450.69x = 158,090.09
  5. Step 5: Solve for x
    x = 158,090.09/450.69
  6. Step 6: Final answer
    x = 350.77

Related Problems

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Double scale
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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.