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Finding the Fourth Proportional to 609.88, 841 and 499

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Solution

The fourth proportional to 609.88, 841 and 499 is: 688.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.88 : 841 = 499 : x
  2. Step 2: Convert to fraction form
    609.88/841 = 499/x
  3. Step 3: Cross multiply
    609.88x = 841 × 499
  4. Step 4: Simplify right side
    609.88x = 419,659
  5. Step 5: Solve for x
    x = 419,659/609.88
  6. Step 6: Final answer
    x = 688.10

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