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Finding the Fourth Proportional to 551,131.20, 825,909.60 and 313,972.80

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Solution

The fourth proportional to 551,131.20, 825,909.60 and 313,972.80 is: 470,510.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,131.20 : 825,909.60 = 313,972.80 : x
  2. Step 2: Convert to fraction form
    551,131.20/825,909.60 = 313,972.80/x
  3. Step 3: Cross multiply
    551,131.20x = 825,909.60 × 313,972.80
  4. Step 4: Simplify right side
    551,131.20x = 259,313,149,658.88
  5. Step 5: Solve for x
    x = 259,313,149,658.88/551,131.20
  6. Step 6: Final answer
    x = 470,510.74

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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.