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Finding the Fourth Proportional to 256,599.42, 384,934.77 and 79,120.38

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Solution

The fourth proportional to 256,599.42, 384,934.77 and 79,120.38 is: 118,691.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,599.42 : 384,934.77 = 79,120.38 : x
  2. Step 2: Convert to fraction form
    256,599.42/384,934.77 = 79,120.38/x
  3. Step 3: Cross multiply
    256,599.42x = 384,934.77 × 79,120.38
  4. Step 4: Simplify right side
    256,599.42x = 30,456,185,277.61
  5. Step 5: Solve for x
    x = 30,456,185,277.61/256,599.42
  6. Step 6: Final answer
    x = 118,691.56

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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.