Home / 1,386,908.80-2,080,363.20-640,412.80

Finding the Fourth Proportional to 1,386,908.80, 2,080,363.20 and 640,412.80

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Solution

The fourth proportional to 1,386,908.80, 2,080,363.20 and 640,412.80 is: 960,619.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,908.80 : 2,080,363.20 = 640,412.80 : x
  2. Step 2: Convert to fraction form
    1,386,908.80/2,080,363.20 = 640,412.80/x
  3. Step 3: Cross multiply
    1,386,908.80x = 2,080,363.20 × 640,412.80
  4. Step 4: Simplify right side
    1,386,908.80x = 1,332,291,221,928.96
  5. Step 5: Solve for x
    x = 1,332,291,221,928.96/1,386,908.80
  6. Step 6: Final answer
    x = 960,619.20

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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.