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Finding the Fourth Proportional to 450.47, 621.62 and 261.42

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Solution

The fourth proportional to 450.47, 621.62 and 261.42 is: 360.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.47 : 621.62 = 261.42 : x
  2. Step 2: Convert to fraction form
    450.47/621.62 = 261.42/x
  3. Step 3: Cross multiply
    450.47x = 621.62 × 261.42
  4. Step 4: Simplify right side
    450.47x = 162,505.93
  5. Step 5: Solve for x
    x = 162,505.93/450.47
  6. Step 6: Final answer
    x = 360.75

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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.