Home / 2,130.84-2,940.44-1,291.28

Finding the Fourth Proportional to 2,130.84, 2,940.44 and 1,291.28

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Solution

The fourth proportional to 2,130.84, 2,940.44 and 1,291.28 is: 1,781.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.84 : 2,940.44 = 1,291.28 : x
  2. Step 2: Convert to fraction form
    2,130.84/2,940.44 = 1,291.28/x
  3. Step 3: Cross multiply
    2,130.84x = 2,940.44 × 1,291.28
  4. Step 4: Simplify right side
    2,130.84x = 3,796,910.20
  5. Step 5: Solve for x
    x = 3,796,910.20/2,130.84
  6. Step 6: Final answer
    x = 1,781.88

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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.