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Finding the Fourth Proportional to 613,305.67, 920,111.60 and 213,949.75

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Solution

The fourth proportional to 613,305.67, 920,111.60 and 213,949.75 is: 320,978.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,305.67 : 920,111.60 = 213,949.75 : x
  2. Step 2: Convert to fraction form
    613,305.67/920,111.60 = 213,949.75/x
  3. Step 3: Cross multiply
    613,305.67x = 920,111.60 × 213,949.75
  4. Step 4: Simplify right side
    613,305.67x = 196,857,646,792.10
  5. Step 5: Solve for x
    x = 196,857,646,792.10/613,305.67
  6. Step 6: Final answer
    x = 320,978.03

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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.