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Finding the Fourth Proportional to 256,608.30, 384,912.45 and 69,619.80

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Solution

The fourth proportional to 256,608.30, 384,912.45 and 69,619.80 is: 104,429.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,608.30 : 384,912.45 = 69,619.80 : x
  2. Step 2: Convert to fraction form
    256,608.30/384,912.45 = 69,619.80/x
  3. Step 3: Cross multiply
    256,608.30x = 384,912.45 × 69,619.80
  4. Step 4: Simplify right side
    256,608.30x = 26,797,527,786.51
  5. Step 5: Solve for x
    x = 26,797,527,786.51/256,608.30
  6. Step 6: Final answer
    x = 104,429.70

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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.