Home / 1,189,221.82-1,641,127.16-645,357.61

Finding the Fourth Proportional to 1,189,221.82, 1,641,127.16 and 645,357.61

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Solution

The fourth proportional to 1,189,221.82, 1,641,127.16 and 645,357.61 is: 890,594.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,221.82 : 1,641,127.16 = 645,357.61 : x
  2. Step 2: Convert to fraction form
    1,189,221.82/1,641,127.16 = 645,357.61/x
  3. Step 3: Cross multiply
    1,189,221.82x = 1,641,127.16 × 645,357.61
  4. Step 4: Simplify right side
    1,189,221.82x = 1,059,113,905,348.49
  5. Step 5: Solve for x
    x = 1,059,113,905,348.49/1,189,221.82
  6. Step 6: Final answer
    x = 890,594.08

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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.