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Finding the Fourth Proportional to 436,645.20, 653,655.60 and 259,060.80

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Solution

The fourth proportional to 436,645.20, 653,655.60 and 259,060.80 is: 387,812.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,645.20 : 653,655.60 = 259,060.80 : x
  2. Step 2: Convert to fraction form
    436,645.20/653,655.60 = 259,060.80/x
  3. Step 3: Cross multiply
    436,645.20x = 653,655.60 × 259,060.80
  4. Step 4: Simplify right side
    436,645.20x = 169,336,542,660.48
  5. Step 5: Solve for x
    x = 169,336,542,660.48/436,645.20
  6. Step 6: Final answer
    x = 387,812.67

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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.