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Finding the Fourth Proportional to 639.30, 880.62 and 452.46

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Solution

The fourth proportional to 639.30, 880.62 and 452.46 is: 623.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.30 : 880.62 = 452.46 : x
  2. Step 2: Convert to fraction form
    639.30/880.62 = 452.46/x
  3. Step 3: Cross multiply
    639.30x = 880.62 × 452.46
  4. Step 4: Simplify right side
    639.30x = 398,445.33
  5. Step 5: Solve for x
    x = 398,445.33/639.30
  6. Step 6: Final answer
    x = 623.25

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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.