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Finding the Fourth Proportional to 425.73, 587.55 and 257.73

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Solution

The fourth proportional to 425.73, 587.55 and 257.73 is: 355.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.73 : 587.55 = 257.73 : x
  2. Step 2: Convert to fraction form
    425.73/587.55 = 257.73/x
  3. Step 3: Cross multiply
    425.73x = 587.55 × 257.73
  4. Step 4: Simplify right side
    425.73x = 151,431.33
  5. Step 5: Solve for x
    x = 151,431.33/425.73
  6. Step 6: Final answer
    x = 355.70

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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.