Home / 2,690.20-3,712.14-1,511.32

Finding the Fourth Proportional to 2,690.20, 3,712.14 and 1,511.32

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Solution

The fourth proportional to 2,690.20, 3,712.14 and 1,511.32 is: 2,085.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.20 : 3,712.14 = 1,511.32 : x
  2. Step 2: Convert to fraction form
    2,690.20/3,712.14 = 1,511.32/x
  3. Step 3: Cross multiply
    2,690.20x = 3,712.14 × 1,511.32
  4. Step 4: Simplify right side
    2,690.20x = 5,610,231.42
  5. Step 5: Solve for x
    x = 5,610,231.42/2,690.20
  6. Step 6: Final answer
    x = 2,085.43

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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.