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Finding the Fourth Proportional to 318,109.88, 438,816.42 and 201,610.22

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Solution

The fourth proportional to 318,109.88, 438,816.42 and 201,610.22 is: 278,111.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,109.88 : 438,816.42 = 201,610.22 : x
  2. Step 2: Convert to fraction form
    318,109.88/438,816.42 = 201,610.22/x
  3. Step 3: Cross multiply
    318,109.88x = 438,816.42 × 201,610.22
  4. Step 4: Simplify right side
    318,109.88x = 88,469,874,975.81
  5. Step 5: Solve for x
    x = 88,469,874,975.81/318,109.88
  6. Step 6: Final answer
    x = 278,111.06

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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.