Home / 2,161.07-2,981.25-1,276.28

Finding the Fourth Proportional to 2,161.07, 2,981.25 and 1,276.28

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Solution

The fourth proportional to 2,161.07, 2,981.25 and 1,276.28 is: 1,760.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.07 : 2,981.25 = 1,276.28 : x
  2. Step 2: Convert to fraction form
    2,161.07/2,981.25 = 1,276.28/x
  3. Step 3: Cross multiply
    2,161.07x = 2,981.25 × 1,276.28
  4. Step 4: Simplify right side
    2,161.07x = 3,804,909.75
  5. Step 5: Solve for x
    x = 3,804,909.75/2,161.07
  6. Step 6: Final answer
    x = 1,760.66

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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.