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Finding the Fourth Proportional to 405,227.26, 607,297.55 and 315,378.46

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Solution

The fourth proportional to 405,227.26, 607,297.55 and 315,378.46 is: 472,644.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,227.26 : 607,297.55 = 315,378.46 : x
  2. Step 2: Convert to fraction form
    405,227.26/607,297.55 = 315,378.46/x
  3. Step 3: Cross multiply
    405,227.26x = 607,297.55 × 315,378.46
  4. Step 4: Simplify right side
    405,227.26x = 191,528,567,037.01
  5. Step 5: Solve for x
    x = 191,528,567,037.01/405,227.26
  6. Step 6: Final answer
    x = 472,644.83

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