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Finding the Fourth Proportional to 936.65, 1,407.03 and 474.32

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Solution

The fourth proportional to 936.65, 1,407.03 and 474.32 is: 712.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.65 : 1,407.03 = 474.32 : x
  2. Step 2: Convert to fraction form
    936.65/1,407.03 = 474.32/x
  3. Step 3: Cross multiply
    936.65x = 1,407.03 × 474.32
  4. Step 4: Simplify right side
    936.65x = 667,375.43
  5. Step 5: Solve for x
    x = 667,375.43/936.65
  6. Step 6: Final answer
    x = 712.51

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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.