Home / 1,990.61-2,747.32-1,432.92

Finding the Fourth Proportional to 1,990.61, 2,747.32 and 1,432.92

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Solution

The fourth proportional to 1,990.61, 2,747.32 and 1,432.92 is: 1,977.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.61 : 2,747.32 = 1,432.92 : x
  2. Step 2: Convert to fraction form
    1,990.61/2,747.32 = 1,432.92/x
  3. Step 3: Cross multiply
    1,990.61x = 2,747.32 × 1,432.92
  4. Step 4: Simplify right side
    1,990.61x = 3,936,696.49
  5. Step 5: Solve for x
    x = 3,936,696.49/1,990.61
  6. Step 6: Final answer
    x = 1,977.63

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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.