Home / 2,115-2,917.44-1,406.16

Finding the Fourth Proportional to 2,115, 2,917.44 and 1,406.16

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Solution

The fourth proportional to 2,115, 2,917.44 and 1,406.16 is: 1,939.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115 : 2,917.44 = 1,406.16 : x
  2. Step 2: Convert to fraction form
    2,115/2,917.44 = 1,406.16/x
  3. Step 3: Cross multiply
    2,115x = 2,917.44 × 1,406.16
  4. Step 4: Simplify right side
    2,115x = 4,102,387.43
  5. Step 5: Solve for x
    x = 4,102,387.43/2,115
  6. Step 6: Final answer
    x = 1,939.66

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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.