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Finding the Fourth Proportional to 257,179.40, 355,584.80 and 225,256.70

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Solution

The fourth proportional to 257,179.40, 355,584.80 and 225,256.70 is: 311,447.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,179.40 : 355,584.80 = 225,256.70 : x
  2. Step 2: Convert to fraction form
    257,179.40/355,584.80 = 225,256.70/x
  3. Step 3: Cross multiply
    257,179.40x = 355,584.80 × 225,256.70
  4. Step 4: Simplify right side
    257,179.40x = 80,097,858,618.16
  5. Step 5: Solve for x
    x = 80,097,858,618.16/257,179.40
  6. Step 6: Final answer
    x = 311,447.41

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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.