Home / 1,385,623.36-2,078,200.80-388,121.92

Finding the Fourth Proportional to 1,385,623.36, 2,078,200.80 and 388,121.92

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Solution

The fourth proportional to 1,385,623.36, 2,078,200.80 and 388,121.92 is: 582,117.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,623.36 : 2,078,200.80 = 388,121.92 : x
  2. Step 2: Convert to fraction form
    1,385,623.36/2,078,200.80 = 388,121.92/x
  3. Step 3: Cross multiply
    1,385,623.36x = 2,078,200.80 × 388,121.92
  4. Step 4: Simplify right side
    1,385,623.36x = 806,595,284,641.54
  5. Step 5: Solve for x
    x = 806,595,284,641.54/1,385,623.36
  6. Step 6: Final answer
    x = 582,117.27

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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.