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Finding the Fourth Proportional to 272.59, 376.52 and 257.20

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Solution

The fourth proportional to 272.59, 376.52 and 257.20 is: 355.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.59 : 376.52 = 257.20 : x
  2. Step 2: Convert to fraction form
    272.59/376.52 = 257.20/x
  3. Step 3: Cross multiply
    272.59x = 376.52 × 257.20
  4. Step 4: Simplify right side
    272.59x = 96,838.72
  5. Step 5: Solve for x
    x = 96,838.72/272.59
  6. Step 6: Final answer
    x = 355.26

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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.