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Finding the Fourth Proportional to 289,706,934.40, 434,560,401.60 and 263,347,460.80

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Solution

The fourth proportional to 289,706,934.40, 434,560,401.60 and 263,347,460.80 is: 395,021,191.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,706,934.40 : 434,560,401.60 = 263,347,460.80 : x
  2. Step 2: Convert to fraction form
    289,706,934.40/434,560,401.60 = 263,347,460.80/x
  3. Step 3: Cross multiply
    289,706,934.40x = 434,560,401.60 × 263,347,460.80
  4. Step 4: Simplify right side
    289,706,934.40x = 114,440,378,325,588,272
  5. Step 5: Solve for x
    x = 114,440,378,325,588,272/289,706,934.40
  6. Step 6: Final answer
    x = 395,021,191.20

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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.