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Finding the Fourth Proportional to 256,408.52, 384,601.62 and 78,933.56

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Solution

The fourth proportional to 256,408.52, 384,601.62 and 78,933.56 is: 118,396.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,408.52 : 384,601.62 = 78,933.56 : x
  2. Step 2: Convert to fraction form
    256,408.52/384,601.62 = 78,933.56/x
  3. Step 3: Cross multiply
    256,408.52x = 384,601.62 × 78,933.56
  4. Step 4: Simplify right side
    256,408.52x = 30,357,975,048.37
  5. Step 5: Solve for x
    x = 30,357,975,048.37/256,408.52
  6. Step 6: Final answer
    x = 118,396.90

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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.