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Finding the Fourth Proportional to 450.42, 621.40 and 325.80

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Solution

The fourth proportional to 450.42, 621.40 and 325.80 is: 449.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.42 : 621.40 = 325.80 : x
  2. Step 2: Convert to fraction form
    450.42/621.40 = 325.80/x
  3. Step 3: Cross multiply
    450.42x = 621.40 × 325.80
  4. Step 4: Simplify right side
    450.42x = 202,452.12
  5. Step 5: Solve for x
    x = 202,452.12/450.42
  6. Step 6: Final answer
    x = 449.47

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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.