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Finding the Fourth Proportional to 307,999.40, 425,040.92 and 172,039.07

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Solution

The fourth proportional to 307,999.40, 425,040.92 and 172,039.07 is: 237,414.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,999.40 : 425,040.92 = 172,039.07 : x
  2. Step 2: Convert to fraction form
    307,999.40/425,040.92 = 172,039.07/x
  3. Step 3: Cross multiply
    307,999.40x = 425,040.92 × 172,039.07
  4. Step 4: Simplify right side
    307,999.40x = 73,123,645,436.30
  5. Step 5: Solve for x
    x = 73,123,645,436.30/307,999.40
  6. Step 6: Final answer
    x = 237,414.90

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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.