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Finding the Fourth Proportional to 1,676.89, 2,515.34 and 622.75

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Solution

The fourth proportional to 1,676.89, 2,515.34 and 622.75 is: 934.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,676.89 : 2,515.34 = 622.75 : x
  2. Step 2: Convert to fraction form
    1,676.89/2,515.34 = 622.75/x
  3. Step 3: Cross multiply
    1,676.89x = 2,515.34 × 622.75
  4. Step 4: Simplify right side
    1,676.89x = 1,566,412.29
  5. Step 5: Solve for x
    x = 1,566,412.29/1,676.89
  6. Step 6: Final answer
    x = 934.12

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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.