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Finding the Fourth Proportional to 360.81, 497.39 and 257.13

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Solution

The fourth proportional to 360.81, 497.39 and 257.13 is: 354.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.81 : 497.39 = 257.13 : x
  2. Step 2: Convert to fraction form
    360.81/497.39 = 257.13/x
  3. Step 3: Cross multiply
    360.81x = 497.39 × 257.13
  4. Step 4: Simplify right side
    360.81x = 127,892.05
  5. Step 5: Solve for x
    x = 127,892.05/360.81
  6. Step 6: Final answer
    x = 354.46

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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.