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Finding the Fourth Proportional to 2,642.84, 3,959.28 and 1,983.44

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Solution

The fourth proportional to 2,642.84, 3,959.28 and 1,983.44 is: 2,971.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,642.84 : 3,959.28 = 1,983.44 : x
  2. Step 2: Convert to fraction form
    2,642.84/3,959.28 = 1,983.44/x
  3. Step 3: Cross multiply
    2,642.84x = 3,959.28 × 1,983.44
  4. Step 4: Simplify right side
    2,642.84x = 7,852,994.32
  5. Step 5: Solve for x
    x = 7,852,994.32/2,642.84
  6. Step 6: Final answer
    x = 2,971.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.