Home / 1,989.47-2,976.72-1,787.38

Finding the Fourth Proportional to 1,989.47, 2,976.72 and 1,787.38

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Solution

The fourth proportional to 1,989.47, 2,976.72 and 1,787.38 is: 2,674.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.47 : 2,976.72 = 1,787.38 : x
  2. Step 2: Convert to fraction form
    1,989.47/2,976.72 = 1,787.38/x
  3. Step 3: Cross multiply
    1,989.47x = 2,976.72 × 1,787.38
  4. Step 4: Simplify right side
    1,989.47x = 5,320,515.65
  5. Step 5: Solve for x
    x = 5,320,515.65/1,989.47
  6. Step 6: Final answer
    x = 2,674.33

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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.