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Finding the Fourth Proportional to 2,676.58, 4,013.87 and 921.09

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Solution

The fourth proportional to 2,676.58, 4,013.87 and 921.09 is: 1,381.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,676.58 : 4,013.87 = 921.09 : x
  2. Step 2: Convert to fraction form
    2,676.58/4,013.87 = 921.09/x
  3. Step 3: Cross multiply
    2,676.58x = 4,013.87 × 921.09
  4. Step 4: Simplify right side
    2,676.58x = 3,697,147.86
  5. Step 5: Solve for x
    x = 3,697,147.86/2,676.58
  6. Step 6: Final answer
    x = 1,381.30

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1.5x scale

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.