Home / 1,982.49-2,987.35-1,643.43

Finding the Fourth Proportional to 1,982.49, 2,987.35 and 1,643.43

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Solution

The fourth proportional to 1,982.49, 2,987.35 and 1,643.43 is: 2,476.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982.49 : 2,987.35 = 1,643.43 : x
  2. Step 2: Convert to fraction form
    1,982.49/2,987.35 = 1,643.43/x
  3. Step 3: Cross multiply
    1,982.49x = 2,987.35 × 1,643.43
  4. Step 4: Simplify right side
    1,982.49x = 4,909,492.39
  5. Step 5: Solve for x
    x = 4,909,492.39/1,982.49
  6. Step 6: Final answer
    x = 2,476.43

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.