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Finding the Fourth Proportional to 450.73, 621.05 and 345.80

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Solution

The fourth proportional to 450.73, 621.05 and 345.80 is: 476.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.73 : 621.05 = 345.80 : x
  2. Step 2: Convert to fraction form
    450.73/621.05 = 345.80/x
  3. Step 3: Cross multiply
    450.73x = 621.05 × 345.80
  4. Step 4: Simplify right side
    450.73x = 214,755.98
  5. Step 5: Solve for x
    x = 214,755.98/450.73
  6. Step 6: Final answer
    x = 476.47

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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.