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Finding the Fourth Proportional to 255,724.60, 383,586.90 and 211,487.80

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Solution

The fourth proportional to 255,724.60, 383,586.90 and 211,487.80 is: 317,231.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,724.60 : 383,586.90 = 211,487.80 : x
  2. Step 2: Convert to fraction form
    255,724.60/383,586.90 = 211,487.80/x
  3. Step 3: Cross multiply
    255,724.60x = 383,586.90 × 211,487.80
  4. Step 4: Simplify right side
    255,724.60x = 81,123,949,589.82
  5. Step 5: Solve for x
    x = 81,123,949,589.82/255,724.60
  6. Step 6: Final answer
    x = 317,231.70

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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.