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Finding the Fourth Proportional to 647,284.91, 971,255.31 and 431,291.27

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Solution

The fourth proportional to 647,284.91, 971,255.31 and 431,291.27 is: 647,155.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,284.91 : 971,255.31 = 431,291.27 : x
  2. Step 2: Convert to fraction form
    647,284.91/971,255.31 = 431,291.27/x
  3. Step 3: Cross multiply
    647,284.91x = 971,255.31 × 431,291.27
  4. Step 4: Simplify right side
    647,284.91x = 418,893,931,287.87
  5. Step 5: Solve for x
    x = 418,893,931,287.87/647,284.91
  6. Step 6: Final answer
    x = 647,155.41

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