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Finding the Fourth Proportional to 938.37, 1,406.12 and 475.46

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Solution

The fourth proportional to 938.37, 1,406.12 and 475.46 is: 712.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.37 : 1,406.12 = 475.46 : x
  2. Step 2: Convert to fraction form
    938.37/1,406.12 = 475.46/x
  3. Step 3: Cross multiply
    938.37x = 1,406.12 × 475.46
  4. Step 4: Simplify right side
    938.37x = 668,544.41
  5. Step 5: Solve for x
    x = 668,544.41/938.37
  6. Step 6: Final answer
    x = 712.45

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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.