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Finding the Fourth Proportional to 257.44, 355 and 183.72

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Solution

The fourth proportional to 257.44, 355 and 183.72 is: 253.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.44 : 355 = 183.72 : x
  2. Step 2: Convert to fraction form
    257.44/355 = 183.72/x
  3. Step 3: Cross multiply
    257.44x = 355 × 183.72
  4. Step 4: Simplify right side
    257.44x = 65,220.60
  5. Step 5: Solve for x
    x = 65,220.60/257.44
  6. Step 6: Final answer
    x = 253.34

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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.