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Finding the Fourth Proportional to 256,601.72, 384,857.21 and 69,627.80

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Solution

The fourth proportional to 256,601.72, 384,857.21 and 69,627.80 is: 104,429.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,601.72 : 384,857.21 = 69,627.80 : x
  2. Step 2: Convert to fraction form
    256,601.72/384,857.21 = 69,627.80/x
  3. Step 3: Cross multiply
    256,601.72x = 384,857.21 × 69,627.80
  4. Step 4: Simplify right side
    256,601.72x = 26,796,759,707.85
  5. Step 5: Solve for x
    x = 26,796,759,707.85/256,601.72
  6. Step 6: Final answer
    x = 104,429.39

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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.