Home / 1,189,418.89-1,641,356.32-645,543.73

Finding the Fourth Proportional to 1,189,418.89, 1,641,356.32 and 645,543.73

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Solution

The fourth proportional to 1,189,418.89, 1,641,356.32 and 645,543.73 is: 890,827.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,418.89 : 1,641,356.32 = 645,543.73 : x
  2. Step 2: Convert to fraction form
    1,189,418.89/1,641,356.32 = 645,543.73/x
  3. Step 3: Cross multiply
    1,189,418.89x = 1,641,356.32 × 645,543.73
  4. Step 4: Simplify right side
    1,189,418.89x = 1,059,567,281,071.87
  5. Step 5: Solve for x
    x = 1,059,567,281,071.87/1,189,418.89
  6. Step 6: Final answer
    x = 890,827.69

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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.