Home / 420,768.89-631,158.92-140,286.23

Finding the Fourth Proportional to 420,768.89, 631,158.92 and 140,286.23

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Solution

The fourth proportional to 420,768.89, 631,158.92 and 140,286.23 is: 210,431.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,768.89 : 631,158.92 = 140,286.23 : x
  2. Step 2: Convert to fraction form
    420,768.89/631,158.92 = 140,286.23/x
  3. Step 3: Cross multiply
    420,768.89x = 631,158.92 × 140,286.23
  4. Step 4: Simplify right side
    420,768.89x = 88,542,905,417.67
  5. Step 5: Solve for x
    x = 88,542,905,417.67/420,768.89
  6. Step 6: Final answer
    x = 210,431.21

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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.