Home / 2,125.32-3,189.03-1,386.37

Finding the Fourth Proportional to 2,125.32, 3,189.03 and 1,386.37

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Solution

The fourth proportional to 2,125.32, 3,189.03 and 1,386.37 is: 2,080.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.32 : 3,189.03 = 1,386.37 : x
  2. Step 2: Convert to fraction form
    2,125.32/3,189.03 = 1,386.37/x
  3. Step 3: Cross multiply
    2,125.32x = 3,189.03 × 1,386.37
  4. Step 4: Simplify right side
    2,125.32x = 4,421,186.30
  5. Step 5: Solve for x
    x = 4,421,186.30/2,125.32
  6. Step 6: Final answer
    x = 2,080.25

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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.