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Finding the Fourth Proportional to 438.29, 657.52 and 145.83

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Solution

The fourth proportional to 438.29, 657.52 and 145.83 is: 218.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.29 : 657.52 = 145.83 : x
  2. Step 2: Convert to fraction form
    438.29/657.52 = 145.83/x
  3. Step 3: Cross multiply
    438.29x = 657.52 × 145.83
  4. Step 4: Simplify right side
    438.29x = 95,888.24
  5. Step 5: Solve for x
    x = 95,888.24/438.29
  6. Step 6: Final answer
    x = 218.78

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