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Finding the Fourth Proportional to 480,749.40, 720,173.70 and 421,651.80

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Solution

The fourth proportional to 480,749.40, 720,173.70 and 421,651.80 is: 631,644.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,749.40 : 720,173.70 = 421,651.80 : x
  2. Step 2: Convert to fraction form
    480,749.40/720,173.70 = 421,651.80/x
  3. Step 3: Cross multiply
    480,749.40x = 720,173.70 × 421,651.80
  4. Step 4: Simplify right side
    480,749.40x = 303,662,536,917.66
  5. Step 5: Solve for x
    x = 303,662,536,917.66/480,749.40
  6. Step 6: Final answer
    x = 631,644.13

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