Home / 800,006.40-1,200,124.80-426,057.60

Finding the Fourth Proportional to 800,006.40, 1,200,124.80 and 426,057.60

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Solution

The fourth proportional to 800,006.40, 1,200,124.80 and 426,057.60 is: 639,147.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,006.40 : 1,200,124.80 = 426,057.60 : x
  2. Step 2: Convert to fraction form
    800,006.40/1,200,124.80 = 426,057.60/x
  3. Step 3: Cross multiply
    800,006.40x = 1,200,124.80 × 426,057.60
  4. Step 4: Simplify right side
    800,006.40x = 511,322,291,988.48
  5. Step 5: Solve for x
    x = 511,322,291,988.48/800,006.40
  6. Step 6: Final answer
    x = 639,147.75

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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.