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Finding the Fourth Proportional to 486,915.20, 731,601.60 and 309,507.20

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Solution

The fourth proportional to 486,915.20, 731,601.60 and 309,507.20 is: 465,041.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,915.20 : 731,601.60 = 309,507.20 : x
  2. Step 2: Convert to fraction form
    486,915.20/731,601.60 = 309,507.20/x
  3. Step 3: Cross multiply
    486,915.20x = 731,601.60 × 309,507.20
  4. Step 4: Simplify right side
    486,915.20x = 226,435,962,731.52
  5. Step 5: Solve for x
    x = 226,435,962,731.52/486,915.20
  6. Step 6: Final answer
    x = 465,041.89

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