Home / 420,970.05-631,014.03-196,145.10

Finding the Fourth Proportional to 420,970.05, 631,014.03 and 196,145.10

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Solution

The fourth proportional to 420,970.05, 631,014.03 and 196,145.10 is: 294,012.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,970.05 : 631,014.03 = 196,145.10 : x
  2. Step 2: Convert to fraction form
    420,970.05/631,014.03 = 196,145.10/x
  3. Step 3: Cross multiply
    420,970.05x = 631,014.03 × 196,145.10
  4. Step 4: Simplify right side
    420,970.05x = 123,770,310,015.75
  5. Step 5: Solve for x
    x = 123,770,310,015.75/420,970.05
  6. Step 6: Final answer
    x = 294,012.15

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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.