Home / 1,200,708.40-1,803,136.20-640,836.40

Finding the Fourth Proportional to 1,200,708.40, 1,803,136.20 and 640,836.40

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Solution

The fourth proportional to 1,200,708.40, 1,803,136.20 and 640,836.40 is: 962,361.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200,708.40 : 1,803,136.20 = 640,836.40 : x
  2. Step 2: Convert to fraction form
    1,200,708.40/1,803,136.20 = 640,836.40/x
  3. Step 3: Cross multiply
    1,200,708.40x = 1,803,136.20 × 640,836.40
  4. Step 4: Simplify right side
    1,200,708.40x = 1,155,515,311,117.68
  5. Step 5: Solve for x
    x = 1,155,515,311,117.68/1,200,708.40
  6. Step 6: Final answer
    x = 962,361.31

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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.