Home / 420,954.11-631,436.57-140,471.36

Finding the Fourth Proportional to 420,954.11, 631,436.57 and 140,471.36

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Solution

The fourth proportional to 420,954.11, 631,436.57 and 140,471.36 is: 210,708.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,954.11 : 631,436.57 = 140,471.36 : x
  2. Step 2: Convert to fraction form
    420,954.11/631,436.57 = 140,471.36/x
  3. Step 3: Cross multiply
    420,954.11x = 631,436.57 × 140,471.36
  4. Step 4: Simplify right side
    420,954.11x = 88,698,753,741.64
  5. Step 5: Solve for x
    x = 88,698,753,741.64/420,954.11
  6. Step 6: Final answer
    x = 210,708.84

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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.