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Finding the Fourth Proportional to 608.18, 839.26 and 356.15

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Solution

The fourth proportional to 608.18, 839.26 and 356.15 is: 491.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.18 : 839.26 = 356.15 : x
  2. Step 2: Convert to fraction form
    608.18/839.26 = 356.15/x
  3. Step 3: Cross multiply
    608.18x = 839.26 × 356.15
  4. Step 4: Simplify right side
    608.18x = 298,900.27
  5. Step 5: Solve for x
    x = 298,900.27/608.18
  6. Step 6: Final answer
    x = 491.47

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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.