Home / 1,971.09-2,720.07-1,272.48

Finding the Fourth Proportional to 1,971.09, 2,720.07 and 1,272.48

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Solution

The fourth proportional to 1,971.09, 2,720.07 and 1,272.48 is: 1,756.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.09 : 2,720.07 = 1,272.48 : x
  2. Step 2: Convert to fraction form
    1,971.09/2,720.07 = 1,272.48/x
  3. Step 3: Cross multiply
    1,971.09x = 2,720.07 × 1,272.48
  4. Step 4: Simplify right side
    1,971.09x = 3,461,234.67
  5. Step 5: Solve for x
    x = 3,461,234.67/1,971.09
  6. Step 6: Final answer
    x = 1,756.00

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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.