Home / 1,971.36-2,720.48-1,087.16

Finding the Fourth Proportional to 1,971.36, 2,720.48 and 1,087.16

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Solution

The fourth proportional to 1,971.36, 2,720.48 and 1,087.16 is: 1,500.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.36 : 2,720.48 = 1,087.16 : x
  2. Step 2: Convert to fraction form
    1,971.36/2,720.48 = 1,087.16/x
  3. Step 3: Cross multiply
    1,971.36x = 2,720.48 × 1,087.16
  4. Step 4: Simplify right side
    1,971.36x = 2,957,597.04
  5. Step 5: Solve for x
    x = 2,957,597.04/1,971.36
  6. Step 6: Final answer
    x = 1,500.28

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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.