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Finding the Fourth Proportional to 257,636.84, 386,268.42 and 173,187.54

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Solution

The fourth proportional to 257,636.84, 386,268.42 and 173,187.54 is: 259,655.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,636.84 : 386,268.42 = 173,187.54 : x
  2. Step 2: Convert to fraction form
    257,636.84/386,268.42 = 173,187.54/x
  3. Step 3: Cross multiply
    257,636.84x = 386,268.42 × 173,187.54
  4. Step 4: Simplify right side
    257,636.84x = 66,896,877,439.49
  5. Step 5: Solve for x
    x = 66,896,877,439.49/257,636.84
  6. Step 6: Final answer
    x = 259,655.71

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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.