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Finding the Fourth Proportional to 668.70, 998.16 and 620.52

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Solution

The fourth proportional to 668.70, 998.16 and 620.52 is: 926.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.70 : 998.16 = 620.52 : x
  2. Step 2: Convert to fraction form
    668.70/998.16 = 620.52/x
  3. Step 3: Cross multiply
    668.70x = 998.16 × 620.52
  4. Step 4: Simplify right side
    668.70x = 619,378.24
  5. Step 5: Solve for x
    x = 619,378.24/668.70
  6. Step 6: Final answer
    x = 926.24

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.