Home / 420,821.20-631,231.80-346,025.80

Finding the Fourth Proportional to 420,821.20, 631,231.80 and 346,025.80

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Solution

The fourth proportional to 420,821.20, 631,231.80 and 346,025.80 is: 519,038.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,821.20 : 631,231.80 = 346,025.80 : x
  2. Step 2: Convert to fraction form
    420,821.20/631,231.80 = 346,025.80/x
  3. Step 3: Cross multiply
    420,821.20x = 631,231.80 × 346,025.80
  4. Step 4: Simplify right side
    420,821.20x = 218,422,488,580.44
  5. Step 5: Solve for x
    x = 218,422,488,580.44/420,821.20
  6. Step 6: Final answer
    x = 519,038.70

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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.