Home / 2,115.96-2,920.36-1,276.79

Finding the Fourth Proportional to 2,115.96, 2,920.36 and 1,276.79

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Solution

The fourth proportional to 2,115.96, 2,920.36 and 1,276.79 is: 1,762.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.96 : 2,920.36 = 1,276.79 : x
  2. Step 2: Convert to fraction form
    2,115.96/2,920.36 = 1,276.79/x
  3. Step 3: Cross multiply
    2,115.96x = 2,920.36 × 1,276.79
  4. Step 4: Simplify right side
    2,115.96x = 3,728,686.44
  5. Step 5: Solve for x
    x = 3,728,686.44/2,115.96
  6. Step 6: Final answer
    x = 1,762.17

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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.