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Finding the Fourth Proportional to 2,676.77, 4,013.53 and 921.11

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Solution

The fourth proportional to 2,676.77, 4,013.53 and 921.11 is: 1,381.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,676.77 : 4,013.53 = 921.11 : x
  2. Step 2: Convert to fraction form
    2,676.77/4,013.53 = 921.11/x
  3. Step 3: Cross multiply
    2,676.77x = 4,013.53 × 921.11
  4. Step 4: Simplify right side
    2,676.77x = 3,696,902.62
  5. Step 5: Solve for x
    x = 3,696,902.62/2,676.77
  6. Step 6: Final answer
    x = 1,381.11

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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.