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Finding the Fourth Proportional to 665.59, 996.83 and 642.52

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Solution

The fourth proportional to 665.59, 996.83 and 642.52 is: 962.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.59 : 996.83 = 642.52 : x
  2. Step 2: Convert to fraction form
    665.59/996.83 = 642.52/x
  3. Step 3: Cross multiply
    665.59x = 996.83 × 642.52
  4. Step 4: Simplify right side
    665.59x = 640,478.23
  5. Step 5: Solve for x
    x = 640,478.23/665.59
  6. Step 6: Final answer
    x = 962.28

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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.