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Finding the Fourth Proportional to 420,703.49, 580,568.51 and 229,715.53

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Solution

The fourth proportional to 420,703.49, 580,568.51 and 229,715.53 is: 317,006.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,703.49 : 580,568.51 = 229,715.53 : x
  2. Step 2: Convert to fraction form
    420,703.49/580,568.51 = 229,715.53/x
  3. Step 3: Cross multiply
    420,703.49x = 580,568.51 × 229,715.53
  4. Step 4: Simplify right side
    420,703.49x = 133,365,598,924.54
  5. Step 5: Solve for x
    x = 133,365,598,924.54/420,703.49
  6. Step 6: Final answer
    x = 317,006.16

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