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Finding the Fourth Proportional to 256,812.80, 385,219.20 and 194,604.80

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Solution

The fourth proportional to 256,812.80, 385,219.20 and 194,604.80 is: 291,907.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,812.80 : 385,219.20 = 194,604.80 : x
  2. Step 2: Convert to fraction form
    256,812.80/385,219.20 = 194,604.80/x
  3. Step 3: Cross multiply
    256,812.80x = 385,219.20 × 194,604.80
  4. Step 4: Simplify right side
    256,812.80x = 74,965,505,372.16
  5. Step 5: Solve for x
    x = 74,965,505,372.16/256,812.80
  6. Step 6: Final answer
    x = 291,907.20

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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.