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Finding the Fourth Proportional to 256,619.63, 384,904.68 and 79,078.97

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Solution

The fourth proportional to 256,619.63, 384,904.68 and 79,078.97 is: 118,610.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,619.63 : 384,904.68 = 79,078.97 : x
  2. Step 2: Convert to fraction form
    256,619.63/384,904.68 = 79,078.97/x
  3. Step 3: Cross multiply
    256,619.63x = 384,904.68 × 79,078.97
  4. Step 4: Simplify right side
    256,619.63x = 30,437,865,642.58
  5. Step 5: Solve for x
    x = 30,437,865,642.58/256,619.63
  6. Step 6: Final answer
    x = 118,610.82

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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.