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Finding the Fourth Proportional to 579,366,860.40, 869,050,290.60 and 515,877,375.60

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Solution

The fourth proportional to 579,366,860.40, 869,050,290.60 and 515,877,375.60 is: 773,816,063.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,366,860.40 : 869,050,290.60 = 515,877,375.60 : x
  2. Step 2: Convert to fraction form
    579,366,860.40/869,050,290.60 = 515,877,375.60/x
  3. Step 3: Cross multiply
    579,366,860.40x = 869,050,290.60 × 515,877,375.60
  4. Step 4: Simplify right side
    579,366,860.40x = 448,323,383,179,145,408
  5. Step 5: Solve for x
    x = 448,323,383,179,145,408/579,366,860.40
  6. Step 6: Final answer
    x = 773,816,063.40

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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.