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Finding the Fourth Proportional to 936.10, 1,405.36 and 662.32

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Solution

The fourth proportional to 936.10, 1,405.36 and 662.32 is: 994.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.10 : 1,405.36 = 662.32 : x
  2. Step 2: Convert to fraction form
    936.10/1,405.36 = 662.32/x
  3. Step 3: Cross multiply
    936.10x = 1,405.36 × 662.32
  4. Step 4: Simplify right side
    936.10x = 930,798.04
  5. Step 5: Solve for x
    x = 930,798.04/936.10
  6. Step 6: Final answer
    x = 994.34

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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.