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Finding the Fourth Proportional to 257,977.44, 355,039.20 and 218,212.92

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Solution

The fourth proportional to 257,977.44, 355,039.20 and 218,212.92 is: 300,313.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,977.44 : 355,039.20 = 218,212.92 : x
  2. Step 2: Convert to fraction form
    257,977.44/355,039.20 = 218,212.92/x
  3. Step 3: Cross multiply
    257,977.44x = 355,039.20 × 218,212.92
  4. Step 4: Simplify right side
    257,977.44x = 77,474,140,546.46
  5. Step 5: Solve for x
    x = 77,474,140,546.46/257,977.44
  6. Step 6: Final answer
    x = 300,313.63

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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.