Home / 439,939,779.20-659,909,668.80-394,023,276.80

Finding the Fourth Proportional to 439,939,779.20, 659,909,668.80 and 394,023,276.80

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Solution

The fourth proportional to 439,939,779.20, 659,909,668.80 and 394,023,276.80 is: 591,034,915.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,939,779.20 : 659,909,668.80 = 394,023,276.80 : x
  2. Step 2: Convert to fraction form
    439,939,779.20/659,909,668.80 = 394,023,276.80/x
  3. Step 3: Cross multiply
    439,939,779.20x = 659,909,668.80 × 394,023,276.80
  4. Step 4: Simplify right side
    439,939,779.20x = 260,019,770,092,578,720
  5. Step 5: Solve for x
    x = 260,019,770,092,578,720/439,939,779.20
  6. Step 6: Final answer
    x = 591,034,915.20

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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.