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Finding the Fourth Proportional to 285,633.80, 428,256.30 and 135,945.80

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Solution

The fourth proportional to 285,633.80, 428,256.30 and 135,945.80 is: 203,826.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,633.80 : 428,256.30 = 135,945.80 : x
  2. Step 2: Convert to fraction form
    285,633.80/428,256.30 = 135,945.80/x
  3. Step 3: Cross multiply
    285,633.80x = 428,256.30 × 135,945.80
  4. Step 4: Simplify right side
    285,633.80x = 58,219,645,308.54
  5. Step 5: Solve for x
    x = 58,219,645,308.54/285,633.80
  6. Step 6: Final answer
    x = 203,826.18

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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.