Home / 1,911.67-2,636.36-1,248.28

Finding the Fourth Proportional to 1,911.67, 2,636.36 and 1,248.28

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Solution

The fourth proportional to 1,911.67, 2,636.36 and 1,248.28 is: 1,721.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.67 : 2,636.36 = 1,248.28 : x
  2. Step 2: Convert to fraction form
    1,911.67/2,636.36 = 1,248.28/x
  3. Step 3: Cross multiply
    1,911.67x = 2,636.36 × 1,248.28
  4. Step 4: Simplify right side
    1,911.67x = 3,290,909.22
  5. Step 5: Solve for x
    x = 3,290,909.22/1,911.67
  6. Step 6: Final answer
    x = 1,721.48

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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.