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Finding the Fourth Proportional to 433.70, 647.50 and 407.64

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Solution

The fourth proportional to 433.70, 647.50 and 407.64 is: 608.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.70 : 647.50 = 407.64 : x
  2. Step 2: Convert to fraction form
    433.70/647.50 = 407.64/x
  3. Step 3: Cross multiply
    433.70x = 647.50 × 407.64
  4. Step 4: Simplify right side
    433.70x = 263,946.90
  5. Step 5: Solve for x
    x = 263,946.90/433.70
  6. Step 6: Final answer
    x = 608.59

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