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Finding the Fourth Proportional to 450.37, 620.98 and 290.64

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Solution

The fourth proportional to 450.37, 620.98 and 290.64 is: 400.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.37 : 620.98 = 290.64 : x
  2. Step 2: Convert to fraction form
    450.37/620.98 = 290.64/x
  3. Step 3: Cross multiply
    450.37x = 620.98 × 290.64
  4. Step 4: Simplify right side
    450.37x = 180,481.63
  5. Step 5: Solve for x
    x = 180,481.63/450.37
  6. Step 6: Final answer
    x = 400.74

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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.