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Finding the Fourth Proportional to 381,243.72, 526,140.18 and 220,128.24

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Solution

The fourth proportional to 381,243.72, 526,140.18 and 220,128.24 is: 303,790.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,243.72 : 526,140.18 = 220,128.24 : x
  2. Step 2: Convert to fraction form
    381,243.72/526,140.18 = 220,128.24/x
  3. Step 3: Cross multiply
    381,243.72x = 526,140.18 × 220,128.24
  4. Step 4: Simplify right side
    381,243.72x = 115,818,311,816.68
  5. Step 5: Solve for x
    x = 115,818,311,816.68/381,243.72
  6. Step 6: Final answer
    x = 303,790.74

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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.