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Finding the Fourth Proportional to 256,586.20, 384,879.30 and 190,320.10

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Solution

The fourth proportional to 256,586.20, 384,879.30 and 190,320.10 is: 285,480.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,586.20 : 384,879.30 = 190,320.10 : x
  2. Step 2: Convert to fraction form
    256,586.20/384,879.30 = 190,320.10/x
  3. Step 3: Cross multiply
    256,586.20x = 384,879.30 × 190,320.10
  4. Step 4: Simplify right side
    256,586.20x = 73,250,266,863.93
  5. Step 5: Solve for x
    x = 73,250,266,863.93/256,586.20
  6. Step 6: Final answer
    x = 285,480.15

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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.