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Finding the Fourth Proportional to 626.06, 937.80 and 430.40

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Solution

The fourth proportional to 626.06, 937.80 and 430.40 is: 644.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.06 : 937.80 = 430.40 : x
  2. Step 2: Convert to fraction form
    626.06/937.80 = 430.40/x
  3. Step 3: Cross multiply
    626.06x = 937.80 × 430.40
  4. Step 4: Simplify right side
    626.06x = 403,629.12
  5. Step 5: Solve for x
    x = 403,629.12/626.06
  6. Step 6: Final answer
    x = 644.71

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