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Finding the Fourth Proportional to 645,166.80, 966,875.40 and 431,326.80

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Solution

The fourth proportional to 645,166.80, 966,875.40 and 431,326.80 is: 646,405.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,166.80 : 966,875.40 = 431,326.80 : x
  2. Step 2: Convert to fraction form
    645,166.80/966,875.40 = 431,326.80/x
  3. Step 3: Cross multiply
    645,166.80x = 966,875.40 × 431,326.80
  4. Step 4: Simplify right side
    645,166.80x = 417,039,272,280.72
  5. Step 5: Solve for x
    x = 417,039,272,280.72/645,166.80
  6. Step 6: Final answer
    x = 646,405.35

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