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Finding the Fourth Proportional to 937.37, 1,406.68 and 389.55

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Solution

The fourth proportional to 937.37, 1,406.68 and 389.55 is: 584.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.37 : 1,406.68 = 389.55 : x
  2. Step 2: Convert to fraction form
    937.37/1,406.68 = 389.55/x
  3. Step 3: Cross multiply
    937.37x = 1,406.68 × 389.55
  4. Step 4: Simplify right side
    937.37x = 547,972.19
  5. Step 5: Solve for x
    x = 547,972.19/937.37
  6. Step 6: Final answer
    x = 584.59

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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.