Home / 1,189,305.45-1,641,242.79-645,441.48

Finding the Fourth Proportional to 1,189,305.45, 1,641,242.79 and 645,441.48

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Solution

The fourth proportional to 1,189,305.45, 1,641,242.79 and 645,441.48 is: 890,709.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,305.45 : 1,641,242.79 = 645,441.48 : x
  2. Step 2: Convert to fraction form
    1,189,305.45/1,641,242.79 = 645,441.48/x
  3. Step 3: Cross multiply
    1,189,305.45x = 1,641,242.79 × 645,441.48
  4. Step 4: Simplify right side
    1,189,305.45x = 1,059,326,175,416.93
  5. Step 5: Solve for x
    x = 1,059,326,175,416.93/1,189,305.45
  6. Step 6: Final answer
    x = 890,709.93

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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.