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Finding the Fourth Proportional to 256,995.60, 385,493.40 and 90,800.40

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Solution

The fourth proportional to 256,995.60, 385,493.40 and 90,800.40 is: 136,200.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,995.60 : 385,493.40 = 90,800.40 : x
  2. Step 2: Convert to fraction form
    256,995.60/385,493.40 = 90,800.40/x
  3. Step 3: Cross multiply
    256,995.60x = 385,493.40 × 90,800.40
  4. Step 4: Simplify right side
    256,995.60x = 35,002,954,917.36
  5. Step 5: Solve for x
    x = 35,002,954,917.36/256,995.60
  6. Step 6: Final answer
    x = 136,200.60

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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.