Home / 420,964.80-631,447.20-263,500.80

Finding the Fourth Proportional to 420,964.80, 631,447.20 and 263,500.80

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Solution

The fourth proportional to 420,964.80, 631,447.20 and 263,500.80 is: 395,251.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,964.80 : 631,447.20 = 263,500.80 : x
  2. Step 2: Convert to fraction form
    420,964.80/631,447.20 = 263,500.80/x
  3. Step 3: Cross multiply
    420,964.80x = 631,447.20 × 263,500.80
  4. Step 4: Simplify right side
    420,964.80x = 166,386,842,357.76
  5. Step 5: Solve for x
    x = 166,386,842,357.76/420,964.80
  6. Step 6: Final answer
    x = 395,251.20

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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.