Home / 289,788,008.20-434,682,012.30-261,122,561.80

Finding the Fourth Proportional to 289,788,008.20, 434,682,012.30 and 261,122,561.80

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Solution

The fourth proportional to 289,788,008.20, 434,682,012.30 and 261,122,561.80 is: 391,683,842.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,788,008.20 : 434,682,012.30 = 261,122,561.80 : x
  2. Step 2: Convert to fraction form
    289,788,008.20/434,682,012.30 = 261,122,561.80/x
  3. Step 3: Cross multiply
    289,788,008.20x = 434,682,012.30 × 261,122,561.80
  4. Step 4: Simplify right side
    289,788,008.20x = 113,505,280,620,155,120
  5. Step 5: Solve for x
    x = 113,505,280,620,155,120/289,788,008.20
  6. Step 6: Final answer
    x = 391,683,842.70

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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.