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Finding the Fourth Proportional to 1,672.12, 2,508.45 and 576.46

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Solution

The fourth proportional to 1,672.12, 2,508.45 and 576.46 is: 864.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.12 : 2,508.45 = 576.46 : x
  2. Step 2: Convert to fraction form
    1,672.12/2,508.45 = 576.46/x
  3. Step 3: Cross multiply
    1,672.12x = 2,508.45 × 576.46
  4. Step 4: Simplify right side
    1,672.12x = 1,446,021.09
  5. Step 5: Solve for x
    x = 1,446,021.09/1,672.12
  6. Step 6: Final answer
    x = 864.78

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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.