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Finding the Fourth Proportional to 360.44, 497.70 and 257

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Solution

The fourth proportional to 360.44, 497.70 and 257 is: 354.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.44 : 497.70 = 257 : x
  2. Step 2: Convert to fraction form
    360.44/497.70 = 257/x
  3. Step 3: Cross multiply
    360.44x = 497.70 × 257
  4. Step 4: Simplify right side
    360.44x = 127,908.90
  5. Step 5: Solve for x
    x = 127,908.90/360.44
  6. Step 6: Final answer
    x = 354.87

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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.