Home / 2,511.12-3,465.06-1,391.78

Finding the Fourth Proportional to 2,511.12, 3,465.06 and 1,391.78

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Solution

The fourth proportional to 2,511.12, 3,465.06 and 1,391.78 is: 1,920.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,511.12 : 3,465.06 = 1,391.78 : x
  2. Step 2: Convert to fraction form
    2,511.12/3,465.06 = 1,391.78/x
  3. Step 3: Cross multiply
    2,511.12x = 3,465.06 × 1,391.78
  4. Step 4: Simplify right side
    2,511.12x = 4,822,601.21
  5. Step 5: Solve for x
    x = 4,822,601.21/2,511.12
  6. Step 6: Final answer
    x = 1,920.50

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1.5x scale

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.