Home / 1,409.40-2,109.24-1,189.08

Finding the Fourth Proportional to 1,409.40, 2,109.24 and 1,189.08

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Solution

The fourth proportional to 1,409.40, 2,109.24 and 1,189.08 is: 1,779.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.40 : 2,109.24 = 1,189.08 : x
  2. Step 2: Convert to fraction form
    1,409.40/2,109.24 = 1,189.08/x
  3. Step 3: Cross multiply
    1,409.40x = 2,109.24 × 1,189.08
  4. Step 4: Simplify right side
    1,409.40x = 2,508,055.10
  5. Step 5: Solve for x
    x = 2,508,055.10/1,409.40
  6. Step 6: Final answer
    x = 1,779.52

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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.