Home / 1,288,315.80-1,932,692.40-389,750.40

Finding the Fourth Proportional to 1,288,315.80, 1,932,692.40 and 389,750.40

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Solution

The fourth proportional to 1,288,315.80, 1,932,692.40 and 389,750.40 is: 584,691.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,315.80 : 1,932,692.40 = 389,750.40 : x
  2. Step 2: Convert to fraction form
    1,288,315.80/1,932,692.40 = 389,750.40/x
  3. Step 3: Cross multiply
    1,288,315.80x = 1,932,692.40 × 389,750.40
  4. Step 4: Simplify right side
    1,288,315.80x = 753,267,635,976.96
  5. Step 5: Solve for x
    x = 753,267,635,976.96/1,288,315.80
  6. Step 6: Final answer
    x = 584,691.76

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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.