Home / 426,544,917.20-639,817,375.80-393,288,520.40

Finding the Fourth Proportional to 426,544,917.20, 639,817,375.80 and 393,288,520.40

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Solution

The fourth proportional to 426,544,917.20, 639,817,375.80 and 393,288,520.40 is: 589,932,780.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,544,917.20 : 639,817,375.80 = 393,288,520.40 : x
  2. Step 2: Convert to fraction form
    426,544,917.20/639,817,375.80 = 393,288,520.40/x
  3. Step 3: Cross multiply
    426,544,917.20x = 639,817,375.80 × 393,288,520.40
  4. Step 4: Simplify right side
    426,544,917.20x = 251,632,829,054,592,736
  5. Step 5: Solve for x
    x = 251,632,829,054,592,736/426,544,917.20
  6. Step 6: Final answer
    x = 589,932,780.60

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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.