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Finding the Fourth Proportional to 253,743.60, 380,621.57 and 85,266.36

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Solution

The fourth proportional to 253,743.60, 380,621.57 and 85,266.36 is: 127,901.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,743.60 : 380,621.57 = 85,266.36 : x
  2. Step 2: Convert to fraction form
    253,743.60/380,621.57 = 85,266.36/x
  3. Step 3: Cross multiply
    253,743.60x = 380,621.57 × 85,266.36
  4. Step 4: Simplify right side
    253,743.60x = 32,454,215,811.39
  5. Step 5: Solve for x
    x = 32,454,215,811.39/253,743.60
  6. Step 6: Final answer
    x = 127,901.61

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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.