Home / 263,415.30-393,956.55-221,424.90

Finding the Fourth Proportional to 263,415.30, 393,956.55 and 221,424.90

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Solution

The fourth proportional to 263,415.30, 393,956.55 and 221,424.90 is: 331,156.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,415.30 : 393,956.55 = 221,424.90 : x
  2. Step 2: Convert to fraction form
    263,415.30/393,956.55 = 221,424.90/x
  3. Step 3: Cross multiply
    263,415.30x = 393,956.55 × 221,424.90
  4. Step 4: Simplify right side
    263,415.30x = 87,231,789,688.10
  5. Step 5: Solve for x
    x = 87,231,789,688.10/263,415.30
  6. Step 6: Final answer
    x = 331,156.88

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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.