Home / 1,189,400.78-1,641,374.69-645,536.57

Finding the Fourth Proportional to 1,189,400.78, 1,641,374.69 and 645,536.57

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Solution

The fourth proportional to 1,189,400.78, 1,641,374.69 and 645,536.57 is: 890,841.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,400.78 : 1,641,374.69 = 645,536.57 : x
  2. Step 2: Convert to fraction form
    1,189,400.78/1,641,374.69 = 645,536.57/x
  3. Step 3: Cross multiply
    1,189,400.78x = 1,641,374.69 × 645,536.57
  4. Step 4: Simplify right side
    1,189,400.78x = 1,059,567,376,032.86
  5. Step 5: Solve for x
    x = 1,059,567,376,032.86/1,189,400.78
  6. Step 6: Final answer
    x = 890,841.34

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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.