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Finding the Fourth Proportional to 256,757.60, 385,158.47 and 67,217.19

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Solution

The fourth proportional to 256,757.60, 385,158.47 and 67,217.19 is: 100,831.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,757.60 : 385,158.47 = 67,217.19 : x
  2. Step 2: Convert to fraction form
    256,757.60/385,158.47 = 67,217.19/x
  3. Step 3: Cross multiply
    256,757.60x = 385,158.47 × 67,217.19
  4. Step 4: Simplify right side
    256,757.60x = 25,889,269,722.01
  5. Step 5: Solve for x
    x = 25,889,269,722.01/256,757.60
  6. Step 6: Final answer
    x = 100,831.56

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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.