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Finding the Fourth Proportional to 256,579.80, 384,906.15 and 79,068.30

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Solution

The fourth proportional to 256,579.80, 384,906.15 and 79,068.30 is: 118,613.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,579.80 : 384,906.15 = 79,068.30 : x
  2. Step 2: Convert to fraction form
    256,579.80/384,906.15 = 79,068.30/x
  3. Step 3: Cross multiply
    256,579.80x = 384,906.15 × 79,068.30
  4. Step 4: Simplify right side
    256,579.80x = 30,433,874,940.05
  5. Step 5: Solve for x
    x = 30,433,874,940.05/256,579.80
  6. Step 6: Final answer
    x = 118,613.68

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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.