Home / 1,389.10-2,079.60-1,348.60

Finding the Fourth Proportional to 1,389.10, 2,079.60 and 1,348.60

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Solution

The fourth proportional to 1,389.10, 2,079.60 and 1,348.60 is: 2,018.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389.10 : 2,079.60 = 1,348.60 : x
  2. Step 2: Convert to fraction form
    1,389.10/2,079.60 = 1,348.60/x
  3. Step 3: Cross multiply
    1,389.10x = 2,079.60 × 1,348.60
  4. Step 4: Simplify right side
    1,389.10x = 2,804,548.56
  5. Step 5: Solve for x
    x = 2,804,548.56/1,389.10
  6. Step 6: Final answer
    x = 2,018.97

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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.