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Finding the Fourth Proportional to 355,986.68, 491,257.86 and 192,639.60

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Solution

The fourth proportional to 355,986.68, 491,257.86 and 192,639.60 is: 265,840.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,986.68 : 491,257.86 = 192,639.60 : x
  2. Step 2: Convert to fraction form
    355,986.68/491,257.86 = 192,639.60/x
  3. Step 3: Cross multiply
    355,986.68x = 491,257.86 × 192,639.60
  4. Step 4: Simplify right side
    355,986.68x = 94,635,716,924.86
  5. Step 5: Solve for x
    x = 94,635,716,924.86/355,986.68
  6. Step 6: Final answer
    x = 265,840.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.