Home / 407,821.60-611,732.40-221,197.60

Finding the Fourth Proportional to 407,821.60, 611,732.40 and 221,197.60

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Solution

The fourth proportional to 407,821.60, 611,732.40 and 221,197.60 is: 331,796.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,821.60 : 611,732.40 = 221,197.60 : x
  2. Step 2: Convert to fraction form
    407,821.60/611,732.40 = 221,197.60/x
  3. Step 3: Cross multiply
    407,821.60x = 611,732.40 × 221,197.60
  4. Step 4: Simplify right side
    407,821.60x = 135,313,738,722.24
  5. Step 5: Solve for x
    x = 135,313,738,722.24/407,821.60
  6. Step 6: Final answer
    x = 331,796.40

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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.