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Finding the Fourth Proportional to 543,347.70, 815,021.55 and 318,815.70

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Solution

The fourth proportional to 543,347.70, 815,021.55 and 318,815.70 is: 478,223.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,347.70 : 815,021.55 = 318,815.70 : x
  2. Step 2: Convert to fraction form
    543,347.70/815,021.55 = 318,815.70/x
  3. Step 3: Cross multiply
    543,347.70x = 815,021.55 × 318,815.70
  4. Step 4: Simplify right side
    543,347.70x = 259,841,665,978.34
  5. Step 5: Solve for x
    x = 259,841,665,978.34/543,347.70
  6. Step 6: Final answer
    x = 478,223.55

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