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Finding the Fourth Proportional to 499,307.40, 688,850.60 and 317,986.88

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Solution

The fourth proportional to 499,307.40, 688,850.60 and 317,986.88 is: 438,698.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,307.40 : 688,850.60 = 317,986.88 : x
  2. Step 2: Convert to fraction form
    499,307.40/688,850.60 = 317,986.88/x
  3. Step 3: Cross multiply
    499,307.40x = 688,850.60 × 317,986.88
  4. Step 4: Simplify right side
    499,307.40x = 219,045,448,045.94
  5. Step 5: Solve for x
    x = 219,045,448,045.94/499,307.40
  6. Step 6: Final answer
    x = 438,698.58

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