Home / 1,989.76-2,743.73-1,243.45

Finding the Fourth Proportional to 1,989.76, 2,743.73 and 1,243.45

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Solution

The fourth proportional to 1,989.76, 2,743.73 and 1,243.45 is: 1,714.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.76 : 2,743.73 = 1,243.45 : x
  2. Step 2: Convert to fraction form
    1,989.76/2,743.73 = 1,243.45/x
  3. Step 3: Cross multiply
    1,989.76x = 2,743.73 × 1,243.45
  4. Step 4: Simplify right side
    1,989.76x = 3,411,671.13
  5. Step 5: Solve for x
    x = 3,411,671.13/1,989.76
  6. Step 6: Final answer
    x = 1,714.61

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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.