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Finding the Fourth Proportional to 436,811.76, 655,144.56 and 121,300.56

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Solution

The fourth proportional to 436,811.76, 655,144.56 and 121,300.56 is: 181,930.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,811.76 : 655,144.56 = 121,300.56 : x
  2. Step 2: Convert to fraction form
    436,811.76/655,144.56 = 121,300.56/x
  3. Step 3: Cross multiply
    436,811.76x = 655,144.56 × 121,300.56
  4. Step 4: Simplify right side
    436,811.76x = 79,469,402,008.95
  5. Step 5: Solve for x
    x = 79,469,402,008.95/436,811.76
  6. Step 6: Final answer
    x = 181,930.55

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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.