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Finding the Fourth Proportional to 689.84, 1,034.52 and 305

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Solution

The fourth proportional to 689.84, 1,034.52 and 305 is: 457.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.84 : 1,034.52 = 305 : x
  2. Step 2: Convert to fraction form
    689.84/1,034.52 = 305/x
  3. Step 3: Cross multiply
    689.84x = 1,034.52 × 305
  4. Step 4: Simplify right side
    689.84x = 315,528.60
  5. Step 5: Solve for x
    x = 315,528.60/689.84
  6. Step 6: Final answer
    x = 457.39

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