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Finding the Fourth Proportional to 937.56, 1,406.62 and 389.78

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Solution

The fourth proportional to 937.56, 1,406.62 and 389.78 is: 584.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.56 : 1,406.62 = 389.78 : x
  2. Step 2: Convert to fraction form
    937.56/1,406.62 = 389.78/x
  3. Step 3: Cross multiply
    937.56x = 1,406.62 × 389.78
  4. Step 4: Simplify right side
    937.56x = 548,272.34
  5. Step 5: Solve for x
    x = 548,272.34/937.56
  6. Step 6: Final answer
    x = 584.79

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1.5x scale

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.