Home / 1,386,606.80-2,079,910.20-389,205.20

Finding the Fourth Proportional to 1,386,606.80, 2,079,910.20 and 389,205.20

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Solution

The fourth proportional to 1,386,606.80, 2,079,910.20 and 389,205.20 is: 583,807.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,606.80 : 2,079,910.20 = 389,205.20 : x
  2. Step 2: Convert to fraction form
    1,386,606.80/2,079,910.20 = 389,205.20/x
  3. Step 3: Cross multiply
    1,386,606.80x = 2,079,910.20 × 389,205.20
  4. Step 4: Simplify right side
    1,386,606.80x = 809,511,865,373.04
  5. Step 5: Solve for x
    x = 809,511,865,373.04/1,386,606.80
  6. Step 6: Final answer
    x = 583,807.80

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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.