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Finding the Fourth Proportional to 1,680.30, 2,520.51 and 447.75

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Solution

The fourth proportional to 1,680.30, 2,520.51 and 447.75 is: 671.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.30 : 2,520.51 = 447.75 : x
  2. Step 2: Convert to fraction form
    1,680.30/2,520.51 = 447.75/x
  3. Step 3: Cross multiply
    1,680.30x = 2,520.51 × 447.75
  4. Step 4: Simplify right side
    1,680.30x = 1,128,558.35
  5. Step 5: Solve for x
    x = 1,128,558.35/1,680.30
  6. Step 6: Final answer
    x = 671.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.