Home / 1,290,080.80-1,935,121.20-391,520.80

Finding the Fourth Proportional to 1,290,080.80, 1,935,121.20 and 391,520.80

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Solution

The fourth proportional to 1,290,080.80, 1,935,121.20 and 391,520.80 is: 587,281.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,080.80 : 1,935,121.20 = 391,520.80 : x
  2. Step 2: Convert to fraction form
    1,290,080.80/1,935,121.20 = 391,520.80/x
  3. Step 3: Cross multiply
    1,290,080.80x = 1,935,121.20 × 391,520.80
  4. Step 4: Simplify right side
    1,290,080.80x = 757,640,200,320.96
  5. Step 5: Solve for x
    x = 757,640,200,320.96/1,290,080.80
  6. Step 6: Final answer
    x = 587,281.20

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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.