Home / 1,189,243.20-1,641,156.69-645,379.03

Finding the Fourth Proportional to 1,189,243.20, 1,641,156.69 and 645,379.03

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Solution

The fourth proportional to 1,189,243.20, 1,641,156.69 and 645,379.03 is: 890,623.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,243.20 : 1,641,156.69 = 645,379.03 : x
  2. Step 2: Convert to fraction form
    1,189,243.20/1,641,156.69 = 645,379.03/x
  3. Step 3: Cross multiply
    1,189,243.20x = 1,641,156.69 × 645,379.03
  4. Step 4: Simplify right side
    1,189,243.20x = 1,059,168,112,670.21
  5. Step 5: Solve for x
    x = 1,059,168,112,670.21/1,189,243.20
  6. Step 6: Final answer
    x = 890,623.64

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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.