Home / 1,187,987.82-1,781,801.30-389,251.68

Finding the Fourth Proportional to 1,187,987.82, 1,781,801.30 and 389,251.68

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Solution

The fourth proportional to 1,187,987.82, 1,781,801.30 and 389,251.68 is: 583,818.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,987.82 : 1,781,801.30 = 389,251.68 : x
  2. Step 2: Convert to fraction form
    1,187,987.82/1,781,801.30 = 389,251.68/x
  3. Step 3: Cross multiply
    1,187,987.82x = 1,781,801.30 × 389,251.68
  4. Step 4: Simplify right side
    1,187,987.82x = 693,569,141,553.02
  5. Step 5: Solve for x
    x = 693,569,141,553.02/1,187,987.82
  6. Step 6: Final answer
    x = 583,818.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.