Home / 2,115.31-2,920.14-1,408.33

Finding the Fourth Proportional to 2,115.31, 2,920.14 and 1,408.33

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Solution

The fourth proportional to 2,115.31, 2,920.14 and 1,408.33 is: 1,944.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.31 : 2,920.14 = 1,408.33 : x
  2. Step 2: Convert to fraction form
    2,115.31/2,920.14 = 1,408.33/x
  3. Step 3: Cross multiply
    2,115.31x = 2,920.14 × 1,408.33
  4. Step 4: Simplify right side
    2,115.31x = 4,112,520.77
  5. Step 5: Solve for x
    x = 4,112,520.77/2,115.31
  6. Step 6: Final answer
    x = 1,944.17

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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.