Home / 1,189.92-1,643.52-1,004.04

Finding the Fourth Proportional to 1,189.92, 1,643.52 and 1,004.04

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Solution

The fourth proportional to 1,189.92, 1,643.52 and 1,004.04 is: 1,386.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.92 : 1,643.52 = 1,004.04 : x
  2. Step 2: Convert to fraction form
    1,189.92/1,643.52 = 1,004.04/x
  3. Step 3: Cross multiply
    1,189.92x = 1,643.52 × 1,004.04
  4. Step 4: Simplify right side
    1,189.92x = 1,650,159.82
  5. Step 5: Solve for x
    x = 1,650,159.82/1,189.92
  6. Step 6: Final answer
    x = 1,386.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.