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Finding the Fourth Proportional to 253,468.08, 380,286.36 and 85,005

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Solution

The fourth proportional to 253,468.08, 380,286.36 and 85,005 is: 127,535.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,468.08 : 380,286.36 = 85,005 : x
  2. Step 2: Convert to fraction form
    253,468.08/380,286.36 = 85,005/x
  3. Step 3: Cross multiply
    253,468.08x = 380,286.36 × 85,005
  4. Step 4: Simplify right side
    253,468.08x = 32,326,242,031.80
  5. Step 5: Solve for x
    x = 32,326,242,031.80/253,468.08
  6. Step 6: Final answer
    x = 127,535.75

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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.