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Finding the Fourth Proportional to 210,505.62, 290,489.22 and 115,015.62

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Solution

The fourth proportional to 210,505.62, 290,489.22 and 115,015.62 is: 158,716.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,505.62 : 290,489.22 = 115,015.62 : x
  2. Step 2: Convert to fraction form
    210,505.62/290,489.22 = 115,015.62/x
  3. Step 3: Cross multiply
    210,505.62x = 290,489.22 × 115,015.62
  4. Step 4: Simplify right side
    210,505.62x = 33,410,797,741.62
  5. Step 5: Solve for x
    x = 33,410,797,741.62/210,505.62
  6. Step 6: Final answer
    x = 158,716.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.