Home / 1,389.87-2,069.57-1,374.39

Finding the Fourth Proportional to 1,389.87, 2,069.57 and 1,374.39

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Solution

The fourth proportional to 1,389.87, 2,069.57 and 1,374.39 is: 2,046.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389.87 : 2,069.57 = 1,374.39 : x
  2. Step 2: Convert to fraction form
    1,389.87/2,069.57 = 1,374.39/x
  3. Step 3: Cross multiply
    1,389.87x = 2,069.57 × 1,374.39
  4. Step 4: Simplify right side
    1,389.87x = 2,844,399.75
  5. Step 5: Solve for x
    x = 2,844,399.75/1,389.87
  6. Step 6: Final answer
    x = 2,046.52

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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.