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Finding the Fourth Proportional to 253,504.49, 380,245.19 and 85,011.86

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Solution

The fourth proportional to 253,504.49, 380,245.19 and 85,011.86 is: 127,513.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,504.49 : 380,245.19 = 85,011.86 : x
  2. Step 2: Convert to fraction form
    253,504.49/380,245.19 = 85,011.86/x
  3. Step 3: Cross multiply
    253,504.49x = 380,245.19 × 85,011.86
  4. Step 4: Simplify right side
    253,504.49x = 32,325,351,383.51
  5. Step 5: Solve for x
    x = 32,325,351,383.51/253,504.49
  6. Step 6: Final answer
    x = 127,513.92

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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.