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Finding the Fourth Proportional to 662.06, 912.56 and 608.42

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Solution

The fourth proportional to 662.06, 912.56 and 608.42 is: 838.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.06 : 912.56 = 608.42 : x
  2. Step 2: Convert to fraction form
    662.06/912.56 = 608.42/x
  3. Step 3: Cross multiply
    662.06x = 912.56 × 608.42
  4. Step 4: Simplify right side
    662.06x = 555,219.76
  5. Step 5: Solve for x
    x = 555,219.76/662.06
  6. Step 6: Final answer
    x = 838.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.