Home / 327,812.40-491,718.60-128,139.30

Finding the Fourth Proportional to 327,812.40, 491,718.60 and 128,139.30

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Solution

The fourth proportional to 327,812.40, 491,718.60 and 128,139.30 is: 192,208.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,812.40 : 491,718.60 = 128,139.30 : x
  2. Step 2: Convert to fraction form
    327,812.40/491,718.60 = 128,139.30/x
  3. Step 3: Cross multiply
    327,812.40x = 491,718.60 × 128,139.30
  4. Step 4: Simplify right side
    327,812.40x = 63,008,477,200.98
  5. Step 5: Solve for x
    x = 63,008,477,200.98/327,812.40
  6. Step 6: Final answer
    x = 192,208.95

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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.