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Finding the Fourth Proportional to 608.40, 839.61 and 359.71

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Solution

The fourth proportional to 608.40, 839.61 and 359.71 is: 496.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.40 : 839.61 = 359.71 : x
  2. Step 2: Convert to fraction form
    608.40/839.61 = 359.71/x
  3. Step 3: Cross multiply
    608.40x = 839.61 × 359.71
  4. Step 4: Simplify right side
    608.40x = 302,014.01
  5. Step 5: Solve for x
    x = 302,014.01/608.40
  6. Step 6: Final answer
    x = 496.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.