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Finding the Fourth Proportional to 608.39, 913.67 and 559.55

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Solution

The fourth proportional to 608.39, 913.67 and 559.55 is: 840.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.39 : 913.67 = 559.55 : x
  2. Step 2: Convert to fraction form
    608.39/913.67 = 559.55/x
  3. Step 3: Cross multiply
    608.39x = 913.67 × 559.55
  4. Step 4: Simplify right side
    608.39x = 511,243.89
  5. Step 5: Solve for x
    x = 511,243.89/608.39
  6. Step 6: Final answer
    x = 840.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.