Home / 2,690.31-3,712.65-1,511.37

Finding the Fourth Proportional to 2,690.31, 3,712.65 and 1,511.37

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Solution

The fourth proportional to 2,690.31, 3,712.65 and 1,511.37 is: 2,085.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.31 : 3,712.65 = 1,511.37 : x
  2. Step 2: Convert to fraction form
    2,690.31/3,712.65 = 1,511.37/x
  3. Step 3: Cross multiply
    2,690.31x = 3,712.65 × 1,511.37
  4. Step 4: Simplify right side
    2,690.31x = 5,611,187.83
  5. Step 5: Solve for x
    x = 5,611,187.83/2,690.31
  6. Step 6: Final answer
    x = 2,085.70

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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.