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Finding the Fourth Proportional to 256,826.40, 385,239.60 and 130,855.20

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Solution

The fourth proportional to 256,826.40, 385,239.60 and 130,855.20 is: 196,282.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,826.40 : 385,239.60 = 130,855.20 : x
  2. Step 2: Convert to fraction form
    256,826.40/385,239.60 = 130,855.20/x
  3. Step 3: Cross multiply
    256,826.40x = 385,239.60 × 130,855.20
  4. Step 4: Simplify right side
    256,826.40x = 50,410,604,905.92
  5. Step 5: Solve for x
    x = 50,410,604,905.92/256,826.40
  6. Step 6: Final answer
    x = 196,282.80

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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.