Home / 420,820.20-631,230.30-263,356.20

Finding the Fourth Proportional to 420,820.20, 631,230.30 and 263,356.20

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Solution

The fourth proportional to 420,820.20, 631,230.30 and 263,356.20 is: 395,034.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,820.20 : 631,230.30 = 263,356.20 : x
  2. Step 2: Convert to fraction form
    420,820.20/631,230.30 = 263,356.20/x
  3. Step 3: Cross multiply
    420,820.20x = 631,230.30 × 263,356.20
  4. Step 4: Simplify right side
    420,820.20x = 166,238,413,132.86
  5. Step 5: Solve for x
    x = 166,238,413,132.86/420,820.20
  6. Step 6: Final answer
    x = 395,034.30

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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.