Home / 420,829.20-631,243.80-263,365.20

Finding the Fourth Proportional to 420,829.20, 631,243.80 and 263,365.20

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Solution

The fourth proportional to 420,829.20, 631,243.80 and 263,365.20 is: 395,047.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,829.20 : 631,243.80 = 263,365.20 : x
  2. Step 2: Convert to fraction form
    420,829.20/631,243.80 = 263,365.20/x
  3. Step 3: Cross multiply
    420,829.20x = 631,243.80 × 263,365.20
  4. Step 4: Simplify right side
    420,829.20x = 166,247,649,635.76
  5. Step 5: Solve for x
    x = 166,247,649,635.76/420,829.20
  6. Step 6: Final answer
    x = 395,047.80

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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.