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Finding the Fourth Proportional to 424.99, 637.35 and 208.72

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Solution

The fourth proportional to 424.99, 637.35 and 208.72 is: 313.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.99 : 637.35 = 208.72 : x
  2. Step 2: Convert to fraction form
    424.99/637.35 = 208.72/x
  3. Step 3: Cross multiply
    424.99x = 637.35 × 208.72
  4. Step 4: Simplify right side
    424.99x = 133,027.69
  5. Step 5: Solve for x
    x = 133,027.69/424.99
  6. Step 6: Final answer
    x = 313.01

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