Home / 2,115.69-2,920.23-1,276.42

Finding the Fourth Proportional to 2,115.69, 2,920.23 and 1,276.42

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Solution

The fourth proportional to 2,115.69, 2,920.23 and 1,276.42 is: 1,761.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.69 : 2,920.23 = 1,276.42 : x
  2. Step 2: Convert to fraction form
    2,115.69/2,920.23 = 1,276.42/x
  3. Step 3: Cross multiply
    2,115.69x = 2,920.23 × 1,276.42
  4. Step 4: Simplify right side
    2,115.69x = 3,727,418.99
  5. Step 5: Solve for x
    x = 3,727,418.99/2,115.69
  6. Step 6: Final answer
    x = 1,761.80

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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.