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Finding the Fourth Proportional to 401,021.46, 553,496.22 and 239,912.46

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Solution

The fourth proportional to 401,021.46, 553,496.22 and 239,912.46 is: 331,131.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,021.46 : 553,496.22 = 239,912.46 : x
  2. Step 2: Convert to fraction form
    401,021.46/553,496.22 = 239,912.46/x
  3. Step 3: Cross multiply
    401,021.46x = 553,496.22 × 239,912.46
  4. Step 4: Simplify right side
    401,021.46x = 132,790,639,740.90
  5. Step 5: Solve for x
    x = 132,790,639,740.90/401,021.46
  6. Step 6: Final answer
    x = 331,131.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.