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Finding the Fourth Proportional to 608.79, 913.41 and 300.45

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Solution

The fourth proportional to 608.79, 913.41 and 300.45 is: 450.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.79 : 913.41 = 300.45 : x
  2. Step 2: Convert to fraction form
    608.79/913.41 = 300.45/x
  3. Step 3: Cross multiply
    608.79x = 913.41 × 300.45
  4. Step 4: Simplify right side
    608.79x = 274,432.30
  5. Step 5: Solve for x
    x = 274,432.30/608.79
  6. Step 6: Final answer
    x = 450.78

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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.