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Finding the Fourth Proportional to 256,628.63, 384,918.18 and 79,087.97

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Solution

The fourth proportional to 256,628.63, 384,918.18 and 79,087.97 is: 118,624.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,628.63 : 384,918.18 = 79,087.97 : x
  2. Step 2: Convert to fraction form
    256,628.63/384,918.18 = 79,087.97/x
  3. Step 3: Cross multiply
    256,628.63x = 384,918.18 × 79,087.97
  4. Step 4: Simplify right side
    256,628.63x = 30,442,397,472.29
  5. Step 5: Solve for x
    x = 30,442,397,472.29/256,628.63
  6. Step 6: Final answer
    x = 118,624.32

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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.