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Finding the Fourth Proportional to 937.76, 1,406.40 and 443.68

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Solution

The fourth proportional to 937.76, 1,406.40 and 443.68 is: 665.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.76 : 1,406.40 = 443.68 : x
  2. Step 2: Convert to fraction form
    937.76/1,406.40 = 443.68/x
  3. Step 3: Cross multiply
    937.76x = 1,406.40 × 443.68
  4. Step 4: Simplify right side
    937.76x = 623,991.55
  5. Step 5: Solve for x
    x = 623,991.55/937.76
  6. Step 6: Final answer
    x = 665.41

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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.