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Finding the Fourth Proportional to 256,616.87, 384,900.57 and 79,076.21

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Solution

The fourth proportional to 256,616.87, 384,900.57 and 79,076.21 is: 118,606.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,616.87 : 384,900.57 = 79,076.21 : x
  2. Step 2: Convert to fraction form
    256,616.87/384,900.57 = 79,076.21/x
  3. Step 3: Cross multiply
    256,616.87x = 384,900.57 × 79,076.21
  4. Step 4: Simplify right side
    256,616.87x = 30,436,479,264.69
  5. Step 5: Solve for x
    x = 30,436,479,264.69/256,616.87
  6. Step 6: Final answer
    x = 118,606.70

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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.