Home / 1,389.96-2,076.80-1,341.53

Finding the Fourth Proportional to 1,389.96, 2,076.80 and 1,341.53

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Solution

The fourth proportional to 1,389.96, 2,076.80 and 1,341.53 is: 2,004.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389.96 : 2,076.80 = 1,341.53 : x
  2. Step 2: Convert to fraction form
    1,389.96/2,076.80 = 1,341.53/x
  3. Step 3: Cross multiply
    1,389.96x = 2,076.80 × 1,341.53
  4. Step 4: Simplify right side
    1,389.96x = 2,786,072.41
  5. Step 5: Solve for x
    x = 2,786,072.41/1,389.96
  6. Step 6: Final answer
    x = 2,004.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.