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Finding the Fourth Proportional to 662.85, 1,001.79 and 655.56

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Solution

The fourth proportional to 662.85, 1,001.79 and 655.56 is: 990.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.85 : 1,001.79 = 655.56 : x
  2. Step 2: Convert to fraction form
    662.85/1,001.79 = 655.56/x
  3. Step 3: Cross multiply
    662.85x = 1,001.79 × 655.56
  4. Step 4: Simplify right side
    662.85x = 656,733.45
  5. Step 5: Solve for x
    x = 656,733.45/662.85
  6. Step 6: Final answer
    x = 990.77

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.