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Finding the Fourth Proportional to 256,798.80, 385,198.20 and 67,258.80

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Solution

The fourth proportional to 256,798.80, 385,198.20 and 67,258.80 is: 100,888.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,798.80 : 385,198.20 = 67,258.80 : x
  2. Step 2: Convert to fraction form
    256,798.80/385,198.20 = 67,258.80/x
  3. Step 3: Cross multiply
    256,798.80x = 385,198.20 × 67,258.80
  4. Step 4: Simplify right side
    256,798.80x = 25,907,968,694.16
  5. Step 5: Solve for x
    x = 25,907,968,694.16/256,798.80
  6. Step 6: Final answer
    x = 100,888.20

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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.