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Finding the Fourth Proportional to 309,554.97, 427,028.56 and 202,187.85

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Solution

The fourth proportional to 309,554.97, 427,028.56 and 202,187.85 is: 278,916.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,554.97 : 427,028.56 = 202,187.85 : x
  2. Step 2: Convert to fraction form
    309,554.97/427,028.56 = 202,187.85/x
  3. Step 3: Cross multiply
    309,554.97x = 427,028.56 × 202,187.85
  4. Step 4: Simplify right side
    309,554.97x = 86,339,986,435.00
  5. Step 5: Solve for x
    x = 86,339,986,435.00/309,554.97
  6. Step 6: Final answer
    x = 278,916.49

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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.