Home / 2,971.12-4,100.64-1,729.12

Finding the Fourth Proportional to 2,971.12, 4,100.64 and 1,729.12

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Solution

The fourth proportional to 2,971.12, 4,100.64 and 1,729.12 is: 2,386.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,971.12 : 4,100.64 = 1,729.12 : x
  2. Step 2: Convert to fraction form
    2,971.12/4,100.64 = 1,729.12/x
  3. Step 3: Cross multiply
    2,971.12x = 4,100.64 × 1,729.12
  4. Step 4: Simplify right side
    2,971.12x = 7,090,498.64
  5. Step 5: Solve for x
    x = 7,090,498.64/2,971.12
  6. Step 6: Final answer
    x = 2,386.47

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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.