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Finding the Fourth Proportional to 613,068.38, 919,688.79 and 213,651.80

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Solution

The fourth proportional to 613,068.38, 919,688.79 and 213,651.80 is: 320,507.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,068.38 : 919,688.79 = 213,651.80 : x
  2. Step 2: Convert to fraction form
    613,068.38/919,688.79 = 213,651.80/x
  3. Step 3: Cross multiply
    613,068.38x = 919,688.79 × 213,651.80
  4. Step 4: Simplify right side
    613,068.38x = 196,493,165,423.32
  5. Step 5: Solve for x
    x = 196,493,165,423.32/613,068.38
  6. Step 6: Final answer
    x = 320,507.75

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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.