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Finding the Fourth Proportional to 256,659.49, 384,860.73 and 79,143.43

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Solution

The fourth proportional to 256,659.49, 384,860.73 and 79,143.43 is: 118,675.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,659.49 : 384,860.73 = 79,143.43 : x
  2. Step 2: Convert to fraction form
    256,659.49/384,860.73 = 79,143.43/x
  3. Step 3: Cross multiply
    256,659.49x = 384,860.73 × 79,143.43
  4. Step 4: Simplify right side
    256,659.49x = 30,459,198,244.50
  5. Step 5: Solve for x
    x = 30,459,198,244.50/256,659.49
  6. Step 6: Final answer
    x = 118,675.52

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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.