Home / 1,990.07-2,744.03-1,428.74

Finding the Fourth Proportional to 1,990.07, 2,744.03 and 1,428.74

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Solution

The fourth proportional to 1,990.07, 2,744.03 and 1,428.74 is: 1,970.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.07 : 2,744.03 = 1,428.74 : x
  2. Step 2: Convert to fraction form
    1,990.07/2,744.03 = 1,428.74/x
  3. Step 3: Cross multiply
    1,990.07x = 2,744.03 × 1,428.74
  4. Step 4: Simplify right side
    1,990.07x = 3,920,497.53
  5. Step 5: Solve for x
    x = 3,920,497.53/1,990.07
  6. Step 6: Final answer
    x = 1,970.03

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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.