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Finding the Fourth Proportional to 608.76, 911.30 and 505.49

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Solution

The fourth proportional to 608.76, 911.30 and 505.49 is: 756.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.76 : 911.30 = 505.49 : x
  2. Step 2: Convert to fraction form
    608.76/911.30 = 505.49/x
  3. Step 3: Cross multiply
    608.76x = 911.30 × 505.49
  4. Step 4: Simplify right side
    608.76x = 460,645.95
  5. Step 5: Solve for x
    x = 460,645.95/608.76
  6. Step 6: Final answer
    x = 756.70

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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.