Home / 420,965.75-631,007.57-196,140.78

Finding the Fourth Proportional to 420,965.75, 631,007.57 and 196,140.78

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Solution

The fourth proportional to 420,965.75, 631,007.57 and 196,140.78 is: 294,005.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,965.75 : 631,007.57 = 196,140.78 : x
  2. Step 2: Convert to fraction form
    420,965.75/631,007.57 = 196,140.78/x
  3. Step 3: Cross multiply
    420,965.75x = 631,007.57 × 196,140.78
  4. Step 4: Simplify right side
    420,965.75x = 123,766,315,985.00
  5. Step 5: Solve for x
    x = 123,766,315,985.00/420,965.75
  6. Step 6: Final answer
    x = 294,005.67

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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.