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Finding the Fourth Proportional to 608.70, 912.32 and 279.28

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Solution

The fourth proportional to 608.70, 912.32 and 279.28 is: 418.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.70 : 912.32 = 279.28 : x
  2. Step 2: Convert to fraction form
    608.70/912.32 = 279.28/x
  3. Step 3: Cross multiply
    608.70x = 912.32 × 279.28
  4. Step 4: Simplify right side
    608.70x = 254,792.73
  5. Step 5: Solve for x
    x = 254,792.73/608.70
  6. Step 6: Final answer
    x = 418.59

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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.