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Finding the Fourth Proportional to 2,511, 3,465.05 and 1,391.85

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Solution

The fourth proportional to 2,511, 3,465.05 and 1,391.85 is: 1,920.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,511 : 3,465.05 = 1,391.85 : x
  2. Step 2: Convert to fraction form
    2,511/3,465.05 = 1,391.85/x
  3. Step 3: Cross multiply
    2,511x = 3,465.05 × 1,391.85
  4. Step 4: Simplify right side
    2,511x = 4,822,822.88
  5. Step 5: Solve for x
    x = 4,822,822.88/2,511
  6. Step 6: Final answer
    x = 1,920.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.