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Finding the Fourth Proportional to 1,676.85, 2,515.27 and 751.90

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Solution

The fourth proportional to 1,676.85, 2,515.27 and 751.90 is: 1,127.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,676.85 : 2,515.27 = 751.90 : x
  2. Step 2: Convert to fraction form
    1,676.85/2,515.27 = 751.90/x
  3. Step 3: Cross multiply
    1,676.85x = 2,515.27 × 751.90
  4. Step 4: Simplify right side
    1,676.85x = 1,891,226.03
  5. Step 5: Solve for x
    x = 1,891,226.03/1,676.85
  6. Step 6: Final answer
    x = 1,127.85

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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.