Home / 1,085,128.80-1,628,470.80-611,311.20

Finding the Fourth Proportional to 1,085,128.80, 1,628,470.80 and 611,311.20

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Solution

The fourth proportional to 1,085,128.80, 1,628,470.80 and 611,311.20 is: 917,404.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085,128.80 : 1,628,470.80 = 611,311.20 : x
  2. Step 2: Convert to fraction form
    1,085,128.80/1,628,470.80 = 611,311.20/x
  3. Step 3: Cross multiply
    1,085,128.80x = 1,628,470.80 × 611,311.20
  4. Step 4: Simplify right side
    1,085,128.80x = 995,502,438,912.96
  5. Step 5: Solve for x
    x = 995,502,438,912.96/1,085,128.80
  6. Step 6: Final answer
    x = 917,404.86

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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.