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Finding the Fourth Proportional to 937.56, 1,406.34 and 288.21

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Solution

The fourth proportional to 937.56, 1,406.34 and 288.21 is: 432.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.56 : 1,406.34 = 288.21 : x
  2. Step 2: Convert to fraction form
    937.56/1,406.34 = 288.21/x
  3. Step 3: Cross multiply
    937.56x = 1,406.34 × 288.21
  4. Step 4: Simplify right side
    937.56x = 405,321.25
  5. Step 5: Solve for x
    x = 405,321.25/937.56
  6. Step 6: Final answer
    x = 432.32

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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.