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Finding the Fourth Proportional to 253,675.28, 380,556.62 and 85,211.80

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Solution

The fourth proportional to 253,675.28, 380,556.62 and 85,211.80 is: 127,832.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,675.28 : 380,556.62 = 85,211.80 : x
  2. Step 2: Convert to fraction form
    253,675.28/380,556.62 = 85,211.80/x
  3. Step 3: Cross multiply
    253,675.28x = 380,556.62 × 85,211.80
  4. Step 4: Simplify right side
    253,675.28x = 32,427,914,592.12
  5. Step 5: Solve for x
    x = 32,427,914,592.12/253,675.28
  6. Step 6: Final answer
    x = 127,832.38

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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.