Home / 263,431.30-393,980.55-221,440.90

Finding the Fourth Proportional to 263,431.30, 393,980.55 and 221,440.90

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Solution

The fourth proportional to 263,431.30, 393,980.55 and 221,440.90 is: 331,180.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,431.30 : 393,980.55 = 221,440.90 : x
  2. Step 2: Convert to fraction form
    263,431.30/393,980.55 = 221,440.90/x
  3. Step 3: Cross multiply
    263,431.30x = 393,980.55 × 221,440.90
  4. Step 4: Simplify right side
    263,431.30x = 87,243,407,574.50
  5. Step 5: Solve for x
    x = 87,243,407,574.50/263,431.30
  6. Step 6: Final answer
    x = 331,180.87

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1.5x scale

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.