Home / 1,189,421.45-1,641,403.14-645,557.18

Finding the Fourth Proportional to 1,189,421.45, 1,641,403.14 and 645,557.18

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Solution

The fourth proportional to 1,189,421.45, 1,641,403.14 and 645,557.18 is: 890,869.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,421.45 : 1,641,403.14 = 645,557.18 : x
  2. Step 2: Convert to fraction form
    1,189,421.45/1,641,403.14 = 645,557.18/x
  3. Step 3: Cross multiply
    1,189,421.45x = 1,641,403.14 × 645,557.18
  4. Step 4: Simplify right side
    1,189,421.45x = 1,059,619,571,673.69
  5. Step 5: Solve for x
    x = 1,059,619,571,673.69/1,189,421.45
  6. Step 6: Final answer
    x = 890,869.74

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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.