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Finding the Fourth Proportional to 545.78, 819.03 and 257.24

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Solution

The fourth proportional to 545.78, 819.03 and 257.24 is: 386.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.78 : 819.03 = 257.24 : x
  2. Step 2: Convert to fraction form
    545.78/819.03 = 257.24/x
  3. Step 3: Cross multiply
    545.78x = 819.03 × 257.24
  4. Step 4: Simplify right side
    545.78x = 210,687.28
  5. Step 5: Solve for x
    x = 210,687.28/545.78
  6. Step 6: Final answer
    x = 386.03

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