Home / 808,720.20-1,212,910.20-408,985.20

Finding the Fourth Proportional to 808,720.20, 1,212,910.20 and 408,985.20

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Solution

The fourth proportional to 808,720.20, 1,212,910.20 and 408,985.20 is: 613,391.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,720.20 : 1,212,910.20 = 408,985.20 : x
  2. Step 2: Convert to fraction form
    808,720.20/1,212,910.20 = 408,985.20/x
  3. Step 3: Cross multiply
    808,720.20x = 1,212,910.20 × 408,985.20
  4. Step 4: Simplify right side
    808,720.20x = 496,062,320,729.04
  5. Step 5: Solve for x
    x = 496,062,320,729.04/808,720.20
  6. Step 6: Final answer
    x = 613,391.78

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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.