Home / 1,187,990.82-1,781,805.81-389,254.68

Finding the Fourth Proportional to 1,187,990.82, 1,781,805.81 and 389,254.68

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Solution

The fourth proportional to 1,187,990.82, 1,781,805.81 and 389,254.68 is: 583,822.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,990.82 : 1,781,805.81 = 389,254.68 : x
  2. Step 2: Convert to fraction form
    1,187,990.82/1,781,805.81 = 389,254.68/x
  3. Step 3: Cross multiply
    1,187,990.82x = 1,781,805.81 × 389,254.68
  4. Step 4: Simplify right side
    1,187,990.82x = 693,576,250,393.69
  5. Step 5: Solve for x
    x = 693,576,250,393.69/1,187,990.82
  6. Step 6: Final answer
    x = 583,822.90

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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.