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Finding the Fourth Proportional to 608.20, 839.82 and 477.16

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Solution

The fourth proportional to 608.20, 839.82 and 477.16 is: 658.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.20 : 839.82 = 477.16 : x
  2. Step 2: Convert to fraction form
    608.20/839.82 = 477.16/x
  3. Step 3: Cross multiply
    608.20x = 839.82 × 477.16
  4. Step 4: Simplify right side
    608.20x = 400,728.51
  5. Step 5: Solve for x
    x = 400,728.51/608.20
  6. Step 6: Final answer
    x = 658.88

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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.