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Finding the Fourth Proportional to 256,797.75, 385,371.60 and 90,585.75

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Solution

The fourth proportional to 256,797.75, 385,371.60 and 90,585.75 is: 135,940.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,797.75 : 385,371.60 = 90,585.75 : x
  2. Step 2: Convert to fraction form
    256,797.75/385,371.60 = 90,585.75/x
  3. Step 3: Cross multiply
    256,797.75x = 385,371.60 × 90,585.75
  4. Step 4: Simplify right side
    256,797.75x = 34,909,175,414.70
  5. Step 5: Solve for x
    x = 34,909,175,414.70/256,797.75
  6. Step 6: Final answer
    x = 135,940.35

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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.