Home / 1,589.80-2,379.30-1,395.40

Finding the Fourth Proportional to 1,589.80, 2,379.30 and 1,395.40

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Solution

The fourth proportional to 1,589.80, 2,379.30 and 1,395.40 is: 2,088.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,589.80 : 2,379.30 = 1,395.40 : x
  2. Step 2: Convert to fraction form
    1,589.80/2,379.30 = 1,395.40/x
  3. Step 3: Cross multiply
    1,589.80x = 2,379.30 × 1,395.40
  4. Step 4: Simplify right side
    1,589.80x = 3,320,075.22
  5. Step 5: Solve for x
    x = 3,320,075.22/1,589.80
  6. Step 6: Final answer
    x = 2,088.36

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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.