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Finding the Fourth Proportional to 608.89, 913.32 and 403.40

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Solution

The fourth proportional to 608.89, 913.32 and 403.40 is: 605.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.89 : 913.32 = 403.40 : x
  2. Step 2: Convert to fraction form
    608.89/913.32 = 403.40/x
  3. Step 3: Cross multiply
    608.89x = 913.32 × 403.40
  4. Step 4: Simplify right side
    608.89x = 368,433.29
  5. Step 5: Solve for x
    x = 368,433.29/608.89
  6. Step 6: Final answer
    x = 605.09

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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.