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Finding the Fourth Proportional to 436,910.70, 655,366.05 and 170,679.90

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Solution

The fourth proportional to 436,910.70, 655,366.05 and 170,679.90 is: 256,019.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,910.70 : 655,366.05 = 170,679.90 : x
  2. Step 2: Convert to fraction form
    436,910.70/655,366.05 = 170,679.90/x
  3. Step 3: Cross multiply
    436,910.70x = 655,366.05 × 170,679.90
  4. Step 4: Simplify right side
    436,910.70x = 111,857,811,877.40
  5. Step 5: Solve for x
    x = 111,857,811,877.40/436,910.70
  6. Step 6: Final answer
    x = 256,019.85

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1.5x scale

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.